Answered: When you mate two curly-haired cats,…

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter13: Patterns In Inherited Traits

Section: Chapter Questions

Problem 4GP

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Cats are hairless when homozygous recessive (hh) for the Hairless gene. Cats have straight hair when recessive for the curly gene (cc). The H gene determines whether hair can be produced, and the C gene determines whether the hair is curly. These genes work in an epistatic pathway, with H/h first, then C/c. You cross a straight-haired cat to a hairless cat with genotype CChh, and find that all of the F1 kittens have curly hair.

When you mate two curly-haired cats, who are both heterozygous for both genes described above, which phenotype will be present at the lowest frequency among the
offspring?
all phenotypes are equally frequent
hairless cats
O straight-haired cats
O curly-haired cats
O straight-haired and hairless cats are the lowest frequency (equal)

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