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Which statement is true about recessive genes?

Study biology 2 - unit 1: genetics lessons 1-5 Flashcards

  1. ed by the alleles, while y is the observable form
  2. individuals who are homozygous for the recessive allele show the trait. Autosomal recessive inheritance depends on the presence of the trait gene on both chromosomes. It is called recessive because two copies of the gene are required for the trait to show up
  3. ant mutations Point.
  4. Which statement is true of a sex-linked recessive genes? A) in an XY male, this recessive gene is always expressed B) In an XY male, one copy is always inactivated C) In an XX female, only one copy is needed for expression D) In an XX female, it is always passed to offspring. D
  5. A. genetic study of pharmacology. B. interplay of genes and environment. C. study of a single gene. D. study of all genes in a genome. B. A father affected with hemophilia A, whose wife is not a carrier and unaffected, will pass on the defective gene to: A. 50% of his daughters, who will be carriers. B. all his sons, who will be affected

It receives 46 copies of each gene from each parent. It can receive 0, 1, or 2 copies of a gene depending on whether the gene is dominant or recessive. Question: QUESTION 7 Which statement below is true about the gene(s) that an offspring receives from its parents? It receives one copy of each gene from each parent It receives two copies of. Which statement is true about recessive genes? WRITE IT! Students who can answer open-ended questions about the lab truly understand the concepts that are being taught. At this station, the students will be answering three task cards: Describe how traits are passed from parents to their offspring. Explain why Punnett squares are used in genetics Which statement is true concerning the difference between adult and childhood cancers? (SATA) A) Childhood cancers are far less likely to be associated with genetic mutations B) Exposure to pesticides is a minor risk for the development of adult cancers. C) Maternal exposure to carcinogenic substances presents little risk to the fetus

SOLVED:Which statement about a test cross is not29

The physical appearance or the way a gene looks is known as it's.... Genetics DRAFT. 5th - 8th grade. Q. G = dominant green and y = recessive yellow A fish has a Gy genotype, what will its phenotype be? answer choices Which is a true statements about this picture? answer choices . Brown is recessive. Brown is dominant Which statement is true about X-linked genes? A. He male needs two copies of the gene but will express the trait regardless of whether the alleles are dominant or recessive B.he male needs two cpies of the gene. But willexpress the trait only if both alleles are dominant males who express the trait receive the recessive allele from their mothers and carry the recessive allele on their X chromosomes. males who express the trait receive the recessive allele from their mothers and carry the recessive allele on their X chromosomes. Red-green colour blindness is a sex-linked recessive trait in humans

[Solved] 1.Which of the following statements is true about ..

  1. ant allele will be expressed, while the effect of the other allele, called recessive, is masked
  2. Two children can pass the recessive gene to their offspring, and two children cannot. Three children can pass the recessive gene to their offspring, and one child cannot. SURVEY . 30 seconds . Q. Which statement is true about genetic information? answer choices . A gene is a section of a chromosome which is composed of DNA located in the.
  3. In X-linked recessive inheritance, a mutation in a gene on the X chromosome causes the phenotype to be expressed in males (because they have one X and one Y chromosome) and in females who are homozygous for the gene mutation. X-linked inheritance means that the gene causing the trait or the disorder is located on the X chromosome
  4. ant gene from one parent and one recessive gene from the other parent. Which statement about the genetic traits of humans is true? What must be true of the parents if an offspring displays the recessive gene for a trait
  5. Which of the following is a TRUE statement regarding autosomal recessive inheritance? Parents will always display the trait. Approximately 50% of children will display the trait. Males and females are affected equally

5. Which of the following statements is true of autosomal recessive disorders? A) Onset is typically late in childhood or early in adulthood. B) Symptomatology is less uniform than with autosomal dominant disorders. C) Mitochondrial DNA is normally the site of genetic alteration. D) Effects are typically the result of alterations in enzyme function. Ans: D Feedback: With autosomal recessive. Which of the following statements is the most true about rare recessive alleles: A. They could be rapidly eliminated from the gene pool if modern medicine did not prolong the life of people affected by recessive genetic diseases B. People who carry disadvantageous ones should probably not have children C A recessive trait is defined as a trait that gets expressed by an individual, when he shows homozygous recessive condition. This means that a individual showing a recessive trait will possess both the recessive alleles for that trait as recessive trait gets concealed by the presence of allele for dominant trait Carriers of recessive genetic disorders are phenotypically normal because the recessive allele is not expressed Oe Pattern baldness is autosomal recessive in men, but autosomal dominant in women. Which of the following statements is NOT TRUE of complete androgen insensitivity syndrome (CAIS)? There is loss of function of the X-linked AR gene specifying the androgen receptor in males. Affected males cannot produce testosterone

Which statement is true? Most genes are not essential

7. Question 17 of 20 5.0/ 5.0 Points The basic principle in deletion mapping is that: A. A deletion that uncovers a recessive mutation must lack a wild-type copy of the mutant gene B. A deletion that covers a recessive mutation must lack a wild-type copy of the mutant gene C. A deletion that uncovers a recessive mutation must contain a wild type copy of the mutant gene D 5.Which of the following statements is true of autosomal recessive disorders? A) Onset is typically late in childhood or early in adulthood. B) Symptomatology is less uniform than with autosomal dominant disorders. C) Mitochondrial DNA is normally the site of genetic alteration. D) Effects are typically the result of alterations in enzyme function. Ans: D Feedback: With autosomal recessive. Image Transcriptionclose. Which of the following statements is FALSE about deletions? O it can cause Cri du Chat syndrome O the loss of a portion of a chromosome is called partial monosomy O the loss of a portion of a chromosome will cause recessive alleles in this same region to express themselves on the other chromosome O double stranded breaks can cause the loss of chromosomal regions O. 2nd statement is true. Explanation: Chromosomes are made up of genes and a gene is made up of two copies of alleles. If an organism has two different types of alleles on its chromosomes then it's a hybrid organism else we call it a pure organism/trait. Gene could be dominant or recessive. A phenotype is the expression of a trait

It receives 46 copies of each gene from each parent. It can receive 0, 1, or 2 copies of a gene depending on whether the gene is dominant or recessive. Question: QUESTION 7 Which statement below is true about the gene(s) that an offspring receives from its parents? It receives one copy of each gene from each parent It receives two copies of. Which of the statements below is TRUE about genes? A. Genes have an alternative pair called alleles B. Genes are not inherited from the parents to offspring C. Genes pairs are always homozygous D. Only the recessive traits in a gene pair is expressed in a organism Which of the following is a TRUE statement regarding autosomal recessive inheritance? Parents will always display the trait. Approximately 50% of children will display the trait. Males and females are affected equally. An individual must be heterozygous to display a recessive trait

parents have dark eyes (Bb) which statement is true? A. Jessica inherited both genes from her father. B. Jessica inherited both genes from her mother. C. Jessica inherited one recessive form of the gene from each parent. D. Jessica inherited one dominant form of the gene from each parent. 2. The gure below shows a Punnet Square for an inherited. Which of the following statements is true? A cross between two RR plants will produce rr offspring. Dominant genes are stronger than recessive genes. Gregor Mendel created the Punnet Square to organize his experimental results. In incomplete dominance, two or more genes are equally dominant

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Which statement is true about X-linked genes? A. The male needs two copies of the gene but will express the trait regardless of whether the alleles are dominant or recessive. B. The male needs two copies of the gene but will express the trait only if both alleles are dominant. C Which statement is true about lethal alleles? They cannot be maintained in a gene pool because the individuals with them never survive. They can be maintained in a gene pool by heterozygous carriers. They cannot be maintained in a gene pool because they are always dominant. They can be maintained in a gene pool if they are expressed befor In certain dogs, the wire hair gene is dominant over the smooth hair gene. A breeder crossed two dogs and obtained a puppy with smooth hair. Which statement is true about inheritance of the trait by the puppy

30 seconds. Q. Sickle cell anemia is a disorder that occurs due to mutations in the genes that produce the hemoglobin protein in human blood. A person who has two mutated alleles for the hemoglobin gene will exhibit sickle cell anemia, with misshapen red blood cells that are not able to carry oxygen efficiently Red eye allele (r) is recessive and black eye allele (B) is dominant in gene Br. Explanation: We are given that a true breeding mouse with red eyes is crossed with a true breeding mouse with black eyes. We are given that all of the offspring mouse have black eyes Recessive means that 2 nonworking copies of the gene are necessary to have the trait or disorder. One is inherited from the mother, and 1 from the father. If you have only 1 recessive gene, you are a carrier for the trait or disease, but you do not have any health problems from carrying 1 copy of the gene answer choices. An organism that has the same genes for a trait (TT or tt) An organism that has different genes for a trait (Tt) When neither gene is fully dominant; offspring is a mixture of both. the different forms of a trait (hair color--> brown, blonde, red. Tags

Autosomal recessive: same abnormal gene present on both chromosomes of a pair X-linked (sex-linked) recessive: abnormal gene is only located on an X chromosome: Term. Which statement is true regarding the TNM (tumor, node, metastasis) cancer staging system? Definition. assesses the size and spread of the primary tumor a) His discoveries concerning genetic inheritance were generally accepted by the scientific community when he published them during the mid 19th century. b) He believed that genetic traits of parents will usually blend in their children. c) His ideas about genetics apply equally to plants and animals

As part of an orientation to a genetic counseling practice, a group of medical students is differentiating between autosomal recessive disorders and autosomal dominant disorders. Which of the following statements is true of autosomal recessive disorders? They can manifest when present in one or both gene pairs 20. Which statement concerning a pair of alleles for a gene controlling a single characteristic in humans is true? a. Both genes come from the father. b. Both genes come from the mother. c. One gene comes from the mother and one gene comes from the father. d. The genes come randomly in pairs from either the mother or father. 21

B. There is a 1 in 4 chance for the sweet pea to be tall. C. 50% of the sweet peas will have the same genotype. D. The next generation of Tt sweet peas combining with Tt will all be tall. 6. Mrs. Cobble has two guinea pigs, one black male and one white female. They have babies, 2 are white, and 5 are black The gene linkage map shown in Figure 7.2 shows the order of genes A. B. and C. Which of the following statements about the genes is true? The distance between A and B is 14.5 map units: Thomas Morgan's research with fruit flies determined that: traits sometimes are inherited as a group: Two genes cross over 6% of the time

c. Evolution can cause gene gain but not gene loss. d. None of the above. 24. Which of the following statements is NOT true? a. The outcome of selection depends on the frequency of an allele and its effects on fitness. b. Rare alleles are almost always in the heterozygous state Apea plant exhibits a recessive trait. which statement is most likely true about the plant? the plant is identical to its parent plant. the plant has different alleles for the gene that codes for the trait. the plant has two identical alleles for the gene that codes for the trait. the plant does not have the same genes for the trait as its parent plant See Page 1. 39. Which statement about mutation is true? A) Some mutations occur spontaneously, simply by chance. B) Mutations cannot be caused by environmental agents. C) The process of mutation depends on the interaction of many genes. D) Germline mutations show us that each of us has a single, permanent genotype a. detect genetic disorders among newborn infants. b. detect adult members of a particular population who may be heterozygous carriers for recessive disorders. c. detect in healthy adults the presence of a mutant allele that may predispose them to some serious health problem later in life

Which statement is true regarding the SRY gene? Please choose the correct answer from the following choices, and then select the submit answer button. SRY is involved in human sex determination. SRY is located on an autosome. SRY is an X-linked gene. Two copies of SRY are normally present in human males. All of these choices are correct A. A gene can code for a specific protein. B. A gene undergoes crossing-over during DNA replication. C. A gene that is very similar in sequence in a human and in a bacterium is probably a recent mutation. D. A gene that is expressed in every offspring of every generation is recessive. E. A gene can exist in alternate forms called introns X-linked recessive genes are expressed in females only if there are two copies of the gene (one on each X chromosome). However, for males, there needs to be only one copy of an X-linked recessive gene in order for the trait or disorder to be expressed. For example, a woman can carry a recessive gene on one of the X chromosomes unknowingly, and. The true statement about Mendel is. Correct option is (D) his discoveries about genetics apply usually to plants and animals. Mendel gave the idea about the genetics inheritance in all the living things. He believe that gene are key of inheritance. Hence, option D is correct

Which of the following statements about lethal alleles is TRUE? Environment does not affect lethal alleles. A recessive lethal can only cause death in the homozygous recessive genotype. Lethal alleles always cause death before or at birth. A dominant lethal can only cause death in the homozygous dominant genotype. Choose the statement that is TRUE Which of the following statements is true for sex- linked traits in birds? a. Both sexes can inherit an allele for a Z- linked trait from either their mother or father 7 Which statement about human blood groups is correct? A A person with the blood group A cannot have an IO allele. B A person with the blood group B may have either the genotype IBIB or IBIO. C In a person with blood group AB, the IB allele is recessive to the allele IA. D The alleles IO and IB are co-dominant and have equal effect on a phenotype. 8 Bacteria can be genetically modified to.

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Joan is phenotypically normal, but had a child with the autosomal recessive disease cystic fibrosis (CF) from a previous marriage. Joan's father has hemophilia A, a sex-linked recessive condition where the blood fails to clot properly. Her father has survived due to recent treatment advances Which of the following statements is true about natural selection? a) It is usually the least powerful evolutionary mechanism. b) Whether individuals are selected for or against by nature ultimately depends on their genotypes. c) It can cause minor changes in gene pool frequencies from generation to generation but not extinctions For Questions 2-8, write True if the statement is true. If the statement is false, change the underlined word to make the statement true. 2. When offspring show a blend of the parents' traits, one allele is dominant over the other. 3. In complete dominance, the heterozygous phenotype lies somewhere between the two homozygous phenotypes. 4 Which statement about alleles is not true? They are different forms of the same gene. There may be several at one locus One may be dominant over another They may show incomplete dominance They occupy different loci on the same chromosome The phenotype of an individual depends at least in part on the genotype. is homozygous determines the.

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Which statement best describes a dominant gene? A. It Is the Gene that produces mutations. B. It Is a gene that produces desirable traits.**. C. It Is the Gene that masks a recessive Gene. D. It Is a gene that Is masked by a dominant gene All of the following statements are true regarding discontinuous genes except; The length of the gene does not correlate with the amount of biological information it contains. Discontinuous genes are also known as split genes. Discontinuous genes possess introns and exons; Only a minority of genes in humans are classified as discontinuous. The pattern gene - A. The A-gene is the primary control on the distribution of eumelanin and phaeomelanin in mammal coats. That's true for rabbits, cavies AND goats. In other words, the A-gene tells you which parts of the goat are going to be the eumelanin color and which parts are going to be the phaeomelanin color Answers: 2 on a question: Which of the statements below is TRUE about genes? A. Genes have an alternative pair called alleles B. Genes are not inherited from the parents to offspring C. Genes pairs are always homozygous D. Only the recessive traits in a gene pair is expressed in a organism

QUESTION 7 Which statement below is true about the Chegg

Watch complete video answer for Which of these statement about Huntington's disease of Biology Class 12th. Get FREE solutions to all questions from chapter HUMAN GENETICS 1) Select the true statements about dominant and recessive genes, assuming complete penetrance of the genotype. Circle all that apply. (1.5) For an offspring to be phenotypically dominant for a trait, at least one parent will show the trait. For an offspring to be phenotypically recessive for a trait, at least one parent will show the trait

A man and woman have a son who is color blind, a recessive

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Which of the following statements is true? 1.all genes are dominant.\ 2.a hybrid organisms has one recessive gene and one dominant gene. 3.genotype is the expression of a trait. 4.only pea plants with two dominant genes for tallness will have a tall phenotype The statement is about the genetic control of cat coat colour. [1 mark] A. Dominant genes are more frequent than recessive genes. B. Genes are composed of DNA. C. Traits are inherited in discrete units, one from each parent. D. Segregation occurs through meiosis. Markscheme C 30 Dominant and Recessive Traits List 1. Widow's Peak. Also known as mid-digital, hairline is a result of expression of the hairline gene. The gene contains 2 alleles: one for straight hairline, which is recessive and the other for widow's peak, which is dominant

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In tomato seedlings, the first leaves can be either green (filled in) or yellow (not filled in). The colour of the leaves is controlled by one gene with two alleles. One allele is dominant and one allele is recessive. Two tomato plants were crossed. The seeds from this cross were grown. The results were obtained in the picture Gene S controls the sharpness of spines in a type of cactus. Cactuses with the dominant allele, S, have sharp spines, whereas homozygous recessive ss cactuses have dull spines. At the same time, a second gene, N, determines whether or not cactuses have spines. Homozygous recessive nn cactuses have no spines at all The two parts of a gene are called alleles. The alleles control the traits of the baby. When the two alleles are different, the stronger trait will be expressed. The stronger trait is the dominant trait, and the other, the recessive trait. The recessive trait has to be paired with a similar recessive trait for it to be expressed

The segment of DNA that codes for a protein and when andChapter 14 PreTest Question 3Part AWhat is an allele Hint

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Is curly hair dominant or recessive? As mentioned earlier, curly hair is an autosomal dominant trait, which means that one of the parents has straight hair, while the other has curly hair. So, you get genes of both types, but the dominant curly hair gene trumps the straight hair gene and expresses itself in the offspring, i.e., yourself Identify which of the following statements about genes is true. (Select all that apply.) Genes are read by tRNA. Genes hold the instructions for traits. Genes are segments on the DNA strand. Genes hold the instructions for . science. deduce what similarities would be found in the DNA structure of genes from a cat human and eucalyptus tree.

Which statement is true about X-linked genes?A

19) Which is a true statement about the genotype of Alissa and Haley regarding color blindness? A) Both carry one recessive allele. B) Alissa is a carrier, and Haley is homozygous dominant. C) Both are homozygous recessive. D) Alissa is homozygous dominant, and Haley is a carrier The gene for red hair is recessive, so a person needs two copies of that gene for it to show up or be expressed. That means even if both parents carry the gene, just one in four of their children. BIOL - 2500 - Genetics 1 Midterm exam 17 October, questions Midterm exam 1 Fall 2018, questions Midterm exam 18 October Fall 2018, questions Exam version B 18 October 2018, answers Test bank Genetic-Analysis-An-Integrated-Approac To manipulate genes to cure diseases. Which statement is true for variable number tandem repeats? ·a.) They are similar in all organisms. ·b.) They are identified as a single nucleotide mutation. ·c.) They are present only in humans. ·d.) They are unique from person to person. Roughly _____ of human DNA codes for proteins Normal gene (R) has become interrupted by the insertion of extra piece of DNA (0.8 kb) into the gene, resulting in allele. In the homozygous mutant form of the gene (R) which is recessive, the activity of the enzyme SBEI is lost resulting in wrinkled peas. The wrinkled seed accumulates more sucrose and high water content

Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form: Most genetic diseases in man are recessive in character The recessive genes humans are always (a) lethal (b) sub-iethal (c) expressed in males In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as (a) If both Assertion and Reason are true and Reason is the correct. For example, a recessive red may be genetically a bar or a checker, but one cannot tell by looking at the bird because the pattern is hidden by the recessive red gene. Recessive red also hides (is epistatic to) the underlying sex-linked color of blue-black, ash-red, or brown There is a gene in the DNA of pea plants that controls plant height (makes them either tall or short). One form of the gene (allele) codes for tall, and the other allele for plant height codes for short. For abbreviations, we use the capital T for the dominant tall allele, and the lowercase t for the recessive short allele The transfer of genes from dead bacteria to live bacteria is called transformation. True. Place the following events of bacterial conjugation in order from first to last. 1 - DNA replication 2 - an enzyme joins F factor DNA ends 3 - sex pilus shortens 4 - DNA transfer 5 - an enzyme cuts F factor DNA. 3, 5, 4, 2, 1