following crosses: (a) pink × pink, (b) white × (c) red × red, (d) red × pink, (

Question

following crosses: (a) pink × pink, (b) white × (c) red × red, (d) red × pink, (e) white × white, and (f) red × white? If you specifically wanted to produce pink flowers, which of these crosses would be most efficient? pink, b. C. 3. The Aa heterozygous snapdragons in Fig. 3.3 are pink, while AA homozygotes are red. However, Mendel's Pp 9. A heterozygous pea flowers were every bit as purple as those of PP homozygotes. Assuming that the A allele and the P allele encode normally functional enzymes and the a and p alleles encode no protein at all, explain why the alleles of gene A and the alleles of gene P interact so differently a. b. 4. In the fruit fly Drosophila melanogaster, very dark

Explanation / Answer

Pp and PP shows purple colored flower in pea plant while pp white.

In case of snapdragons we found that AA shows red colored flower while Aa shows pink.

In both cases gene interactions are different.

Here, it is given that allele A and P shows normal functional enzymes while a and p allele not codes for any protein.

Snapdragons show incomplete dominance. Actually AA X aa i.e. red X white will give AA, Aa, aa (red, pink and white). Here, neither red or white allele is dominant.

In case of peas, PP X pp i.e. purple crosses with white we will get PP, Pp (purple) and pp (white). It is because P gene is dominant over p or we can here is complete dominance of P over p.

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