Question

99.A black male mouse (1) is crossed with a black female mouse, and they
produce 15 black and 5 white offspring. A different black male mouse
(II) is crossed with the same female, and the offspring from this mating
are 30 black mice. Which of the following must be true?
A. The female mouse is homozygous.
Male mouse II is heterozygous.
e. Two of the mice are heterozygous.
D. All the progeny of mouse II are homozygous.
E. All three mice are homozygous.
B.​

Answer 1

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