1) What is meant by epistasis? The natural colouration of wild mice is called agouti and is produced from banded hairs. Two genes are involved, each with a dominant (A and B) and a recessive allele (a and b). The allele A codes for the ability to produce hair pigment: AA and Aa mice have pigmented hairs but all aa individuals are albinos. The B allele codes for the ability to make hair with grduated colouration: BB and Bb mice have graduated hair, bb mice have hair that is all one colour which is black.

1) What is meant by epistasis? The natural colouration of wild mice is called agouti and is produced from banded hairs. Two genes are involved, each with a dominant (A and B) and a recessive allele (a and b). The allele A codes for the ability to produce hair pigment: AA and Aa mice have pigmented hairs but all aa individuals are albinos. The B allele codes for the ability to make hair with grduated colouration: BB and Bb mice have graduated hair, bb mice have hair that is all one colour which is black.

Name: Q10.1) What is meant by epistasis?The natural colouration of wild mic
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Description: Q10.1) What is meant by epistasis?The natural colouration of wild mice is called agouti and is produced from bandedgenes are involved, each with a dominant (A and B) and a recessive allele (a and b). The alleleA codes for the ability to produce hair

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

Chapter12: Mendel, Genes, And Inheritance

Section: Chapter Questions

Problem 16TYK: Having malformed hands with shortened fingers is a dominant trait controlled by a single gene;...

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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 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
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.…
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
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?
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