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?
a) all white
b) 1/2 white, 1/2 yellow
c) 1/2 white, 1/4 yellow, 1/4 green
d) 1/2 white, 1/2 green
e) 1/4 white, 1/2 yellow, 1/4 green

Answer 1

Answer: Option B is the correct answer

Explanation: When the cross occur between Ww Yy * Ww yy, the result is WwWw 1/2 (white), Wwyy 1/2(white), WwYy 1/2(white yellow), Yy yy 1/2( Yellow) because yy is recessive green color it will not show the green trait in the phenotype of the fruit