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Tail length is a genetic trait in mice. A purebred short-tail mouse is crossed with a...

Tail length is a genetic trait in mice. A purebred short-tail mouse is crossed with a hybrid short-tail mouse. What is the chance of having F1 long-tail mouse?
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Answer #1

Hybrid mice is short tail. Which means short tail is dominant. One parent is purebred short tail. Another is hybrid short tail. The chance of the F1 with long tail is nil.

S----Allele for short tail (dominant), s---allele for long tail (recessive)

Because pure bred mouse and hybrid mouse are both short tailed, offspring will not have long tail. So the chances of the offspring with long tail is nil.

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