In mice, the waltzing allele (w) that causes the mouse to run in circles due to an inner ear defect is recessive to the non-waltzing allele (W). If a heterozygous mouse mated with a waltzing mouse,

Question 3 options

100% of the offspring would have a copy of the recessive allele

75% of the offspring would have the dominant trait

75% of the offspring would have the recessive trait

100% of the offspring would have a copy of the dominant allele

3 years ago

Answered By Emily D

Hey this is a punnet square problem! Heterozygous tells us one of the mice is Ww, and knowing the other is "waltzing" tells us it must have two copies of the recessive gene (ww)

So we have a ww mouse mating with a Ww mouse. Hopefully, this punnet square is legible

___|_W_|_w_|

_w_|.Ww|.ww.|

_w_|.Ww|.ww.|

Our offspring are the 4 bottom-right cells (Ww, Ww, ww, and ww)

- 100% of the offspring carry the recessive (w) allele

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