Question

In cats, coat color is an X-linked trait with incomplete dominance. Yellow coat is caused by the allele XT and black coat by the allele Xt. A tortoise cost is caused by the heterozygous condition. What is the correct way to represent the genotype of a male cat with a black coat

Answer 1

Answer:

The genotype of a black male is XtY

Explanation:

Available data:

• coat color is an X-linked trait with incomplete dominance.
• Yellow coat is caused by the allele XT
• Black coat by the allele Xt.
• Tortoise coat is caused by the heterozygous condition

So,

females genotypes           females phenotype

•   XTXT                →        Yellow coat
•   XtXt                  →         Black coat
•   XTXt                 →         Tortoise coat

males genotype                    males phenotype

•   XTY                   →         Yellow coat
•   XtY                    →         Black coat

Males only carry one X chromosome, so they can only be either black - XtY- or yellow -XTY-.

Females are the only ones that can express the tortoise coat.