Q17. In a dog breed, a gene B coding for fur color has a dominant allele B for black fur. Gene B has a recessive allele b that produces brown fur. A second gene I, has a dominant allele I that is epistatic to the color locus and can inhibit pigment formation. Gene I has a recessive allele, i, on that permits pigment deposition in the fur. Note: the inhibition of pigment formation by the epistatic allele I causes the fur to be white. A) What is the phenotype of the individuals with the below genotypes? bbii Bbli Bbii bbli BBIi B) What are the phenotypes and genotypes of the offspring of each of these dog crosses? a. bbii x Bbli b. bbii x Bbii c. bbli x BBli C) What type of epistasis is described in this problem?

Q17. In a dog breed, a gene B coding for fur color has a dominant allele B for black fur. Gene B has a recessive allele b that produces brown fur. A second gene I, has a dominant allele I that is epistatic to the color locus and can inhibit pigment formation. Gene I has a recessive allele, i, on that permits pigment deposition in the fur. Note: the inhibition of pigment formation by the epistatic allele I causes the fur to be white. A) What is the phenotype of the individuals with the below genotypes? bbii Bbli Bbii bbli BBIi B) What are the phenotypes and genotypes of the offspring of each of these dog crosses? a. bbii x Bbli b. bbii x Bbii c. bbli x BBli C) What type of epistasis is described in this problem?

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Description: Q17. In a dog breed, a gene B coding for fur color has a dominant allele B for black fur. Gene B has a recessiveallele b that produces brown fur. A second gene I, has a dominant allele I that is epistatic to the color locus andcan inhibit pigment fo

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter21: Microevolution: Genetic Changes Within Populations

Section: Chapter Questions

Problem 12TYK: Discuss Concepts Many human diseases are caused by recessive alleles that are not expressed in...

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Q. 1: In rats, the following genotypes of two independently assorting autosomal genes determine coat color:A–B– (gray)A–bb (yellow)aaB– (black)aabb (cream)A third gene pair on a separate autosome determines whether or not any color will be produced. The CC and Cc genotypes allow color according to the expression of the A and B alleles.However, the cc genotype results in albino rats regardless of the A and B alleles present.Determine the F1 phenotypic ratio of the following crosses:(a) AAbbCC × aaBBcc(b) AaBBCC × AABbcc(c) AaBbCc × AaBbcc(d) AaBBCc × AaBBCc(e) AABbCc × AABbcc The above sub-part of question is already solved Q. 2: Given the inheritance pattern of coat color in rats described in Q 3, predict the genotypeand phenotype of the parents who produced the following offspring:(a) 9/16 gray: 3/16 yellow: 3/16 black: 1/16 cream(b) 9/16 gray: 3/16 yellow: 4/16 albino(c) 27/64 gray: 16/64 albino: 9/64 yellow: 9/64 black: 3/64 cream(d) 3/8 black: 3/8 cream: 2/8 albino(e) 3/8 black:…
Q. 3: In rats, the following genotypes of two independently assorting autosomal genes determine cont color: A-B- (gray) A-bb (yellow) aab (black) aabb (cream) A third gene pair on a separate autosome determines whether or not any color will be produced. The CC and Ce genotypes allow color according to the expression of the A and B alleles. However, the ce genotype results in albino rats regardless of the A and B alleles present. Determine the Fl phenotypic ratio of the following crosses: (a) AAbbCC x aaBBcc (b) AaBBCC x AABbce (c) AaBbCc x AaBbcc (d) AaBBCe x AaBBCe (e) AABbCe x AABbee
Q. 3: In rats, the following genotypes of two independently assorting autosomal genes determine coat color A–B– (gray A–bb (yellow aaB– (black aabb (cream A third gene pair on a separate autosome determines whether or not any color will be produced The CC and Cc genotypes allow color according to the expression of the A and B alleles However, the cc genotype results in albino rats regardless of the A and B alleles present Determine the F1 phenotypic ratio of the following crosses (a) AAbbCC × aaBBc (b) AaBBCC × AABbc (c) AaBbCc × AaBbc (d) AaBBCc × AaBBC (e) AABbCc × AABbc Q. 4: Given the inheritance pattern of coat color in rats described in Q 3, predict the genotyp and phenotype of the parents who produced the following offspring (a) 9/16 gray: 3/16 yellow: 3/16 black: 1/16 crea (b) 9/16 gray: 3/16 yellow: 4/16 albin (c) 27/64 gray: 16/64 albino: 9/64 yellow: 9/64 black: 3/64 cream (d) 3/8 black: 3/8 cream: 2/8 albino (e) 3/8 black: 4/8 albino: 1/8 cream
Having malformed hands with shortened fingers is a dominant trait controlled by a single gene; people who are homozygous for the recessive allele have normal hands and fingers. Having woolly hair is a dominant trait controlled by a different gene; homozygous recessive individuals have normal, nonwoolly hair. Suppose a woman with normal hands and nonwoolly hair marries a man who has malformed hands and woolly hair. Their first child has normal hands and nonwoolly hair. What are the genotypes of the mother, the father, and the child? If this couple has a second child, what is the probability that it will have normal hands and woolly hair?
Q1. How many genes are there in contig1? Q2. what are the names of these genes? Q3. Which gene ha the largest span (i.e, the largest distance between the start and the end of the gene)?
12. A heterozygous agouti mink is bred with a true-breeding white mink. Of the three offspring, one is an agouti male, one is a white male, and one is a black female. What is thesimplest explanation as to coat colour inheritance in these mink? the agouti allele is sex-linked a single gene is involved with the agouti allele being dominant a single gene is involved with the white allele being recessive at least two genes are involved
Why is it more efficient to perform a test cross with a homozygous recessive donor than a homozygous dominant donor? How could the same information still he found with a homozygous dominant donor?
ACTIVITY 3: Incomplete dominance vs. codominance Coat color in dragons is controlled by 2 alleles. A black dragon is crossed with a white dragon and all of the offspring are gray. Are the alleles incompletely dominant or codominant? ___ Explain (how do you know)? What would offspring of the other type probably look like? __
11. Blood type is controlled by a gene with multiple alleles. A produces type A blood. B codes for type B blood. A and B are codominant so a heterozygote has type AB blood. The O allele is recessive to both A and B and produces type O blood. A. What are the possible genotypes of a man with type A blood? B. What are the possible genotypes of a man with type B blood? C. Can a man with type B blood be the father of a baby with type O blood? Why or why not? Explain your answer. D. A man with type A blood marries a woman with type B blood. What blood types are possible for their children? Explain your answer. E. A man with type O blood is in a car accident and has to receive a transfusion at the hospital. What types of blood can he receive? F. In the Charlie Chaplin paternity case of the 1940s, a young woman sued Chaplin for child support, claiming he was the father of her child. Chaplin’s blood was type O, the mother was type A and the baby was type B. Could…
13. A dominant x-linked allele (B) gives normal color vision but the recessive allele (b) causes red-green color blindness.A. What is the genotype of a man with normal color vision whose father was color- blind? B. What is the genotype of a woman with normal color vision whose father was color-blind? C. If a woman who is colorblind marries a man with normal vision, what would you expect for the genotypes and phenotypes of their children? D. If a man is color-blind, which parent did he inherit the gene from? Explain your answer. E. Which parent does a man get all his x-linked genes from? F. If a woman is color-blind, what do you know about the genotypes and phenotypes of her parents? G. Are men more likely than women to get a genetic disease which is x-linked and dominant? Are they more likely to get a disease that is x-linked and recessive? Explain your answers. H. Can a man with normal color vision have a colorblind daughter? Explain your answer.…
Activity 9GENES SEGREGATION BY BEAN-O TYPE Materials: Colored beans to represent the gene for a certain trait of garden pea. (60 pieces of the same size and shape; 30 pieces of which are of different colors from rest) Procedures: 1. Place the 30 pieces beans (one color) to one container and the other 30 pieces to the other container. Assign which color of beans will represent dominant and recessive genes of a specific trait of garden pea 2. Label the paper container as First Parent P1, male and other P1 female 3. At random, segregate the beans on the Lab table. Assume fertilization occurs and First filial generations (F1) are formed 4. Categorize the formed First filial generations 5. Put all the beans in one container. Assume that all the first filial generations undergo self-fertilization 6. Pick up the beans by two from the container without looking at it and collect the second Filial generation (F2) 7. Categorize the formed Second filial generations into two (2) phenotype, and…
23. In horses, black color is influenced by the dominant allele B and chestnut coat color is influenced by the recessive allele b. Trotting gait is due to a dominant allele T, pacing gait to the recessive allele t. A black trotter who is homozygous for both traits is crossed to a chestnut pacer. a. What are the genotypes of the Pgeneration? b. What will be the genotype and phenotype of the F1 generation? c. Draw a punnett square showing the cross of two F1 generation horses. What is the phenotypic ratio of all the combinations?