Question Biology

Question

I. When black pigeon is crossed with a test cross (White) pigeon gives you 100% brown pigeons. What are the genotypes and phenotypes of a cross between F1*F1

Answer 1

The gentic problem above is showing a case of incomplete dominance. The offspring get one allele from each parent Black(B) and White (W).

The Parent Cross: BB x WW

All F1 offspring: BW

The F1 Cross: BW x BW

The F2 Genotype: 25% BB, 50% BW, 25%WW.

The F2 Phenotypes: 25% Black, 50% brown, 25% white.

I have made a Punnett Square of the cross but won’t upload.

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