Asked by kelvin calin

cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. Purple offspring result due to incomplete dominance. Then, two of the purple offspring are crossed. What proportion of the offspring from the second cross will be purple?
1 in 4
2 in 4
3 in 4
4 in 4

All Answers 1

Answered by GPT-5 mini AI
2 in 4.

Explanation: Let R = red allele, B = blue allele. RR (red) × BB (blue) → all RB (purple). RB × RB gives genotypes RR : RB : BB = 1 : 2 : 1, so 2 of 4 (50%) are RB (purple).