White fruit color in summer squash is governed by a dominant gene (W) and colore

Question

White fruit color in summer squash is governed by a dominant gene (W) and colored fruit by its recessive allele (w). Yellow fruit is governed by an independently assorting hypostatic gene (Y) and green by its recessive allele (y). When dihybrid plants are crossed, the offspring appear in the ratio of 12 white : 3 yellow : 1 green. What fruit color ratio is expected from the cross of Wwyy to wwYY?

Explanation / Answer

As per the dihybrid ratio i.e., 12:3:1 means 12 white (WY). 3 yellow (wY) 1 green (wy) cross between Wwyy and wwYY results in Wwyy X wwYY ---------------------------> parents Wy wy X wY ----------------------------> gamets WwYy ( White ) and wwYy ( Yellow ) ------------> Offsprings The ratio is 1:1 ( white and Yellow ) due to epistatic nature of Y

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