Question

In a certain breed of cats, having black hair is the result of two dominant alleles for hair color (HH). The heterozygous genotype (Hh) produces a cat that has black and white spots. Having two recessive (hh) genes results in a white-haired cat. The Punnett square below shows the results of a cross between which two cats?
H H
H HH HH
h Hh Hh
A.
two black cats
B.
two spotted cats
C.
a spotted cat and a white cat
D.
a black cat and a spotted cat

Answer 1

D. a black cat (HH) and a spotted cat (Hh)

Explanation: The top gametes are H and H (from an HH parent) and the side gametes are H and h (from an Hh parent), so the cross is HH × Hh.