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Rasek [7]
3 years ago
8

A single gene mutation in cats can result in curly ears (see image). The cats are healthy and normal beyond the ear structure, w

hich actually changes after birth.
This trait is recessive, and the allele for curly ears is $ and the allele for regular ears is S.

Which of the following responses are true? (SELECT ALL correct answers)
curly_ear_cat.jpeg

a. A cross between this cat and another curly ear cat will result in 100% curly ears
b. A cross between this cat and another curly ear cat will result in 50% straight ears
c. The genotype of the cat in the picture is $$
d. The phenotype of the cat is $$
e. Mutations are always bad, even in cats.
f. A cross between this cat and another curly ear cat will result in 100% straight ears
g. The genotype of the cat in the picture is S$
h. A cross between this cat and a homozygous normal ear cat will result in 100% normal ears
Biology
1 answer:
kicyunya [14]3 years ago
7 0

The following responses are true;

a. A cross between this cat and another curly ear cat will result in 100% curly ears

c. The genotype of the cat in the picture is $$

g. The genotype of the cat in the picture is S$

h. A cross between this cat and a homozygous normal ear cat will result in 100% normal ears

Explanation:

Because the allele for curly ears is recessive, then all the cats with curly ears have a homozygous recessive genotype ($$) because the don't have a domiant allele (S) to mask the effect of the recessive allele.

A cross between two curly-eared cats (which means they both are homozygous recessive individuals) will result in 100% curly-eared offspring with homozygous recessive genotypes.

A cross with homozygous dominant individual will result in all offspring being straight-eared but with heterozygous genotypes.

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