In pumpkin, the white color of the fruit dominates over the yellow. If you cross pumpkins homozygous

In pumpkin, the white color of the fruit dominates over the yellow. If you cross pumpkins homozygous for white fruit color with pumpkin homozygous for yellow fruit color. a) what will be the genotype and phenotype of the first generation. b) what types of cleavage will be obtained in the offspring of the second generation by genotype and phenotype.

Let’s designate the gene that determines the development of a white fruit in a pumpkin as B, then the gene for a yellow fruit will be designated as in.

Pumpkin – homozygous for the gene for white color will be written as BB. This pumpkin produces germ cells B.

A pumpkin homozygous for a yellow color will be in, the germ cells produced by it – b.

a). All F1 pumpkin offspring will have white fruits and the BB genotype. Such pumpkins, in turn, produce sex cells b and B.

When crossing them together, you get the following options:

pumpkins – homozygotes with white fruit (BB) – 25%;

pumpkins – heterozygotes with a white fruit (Bb) – 50%;

pumpkins – homozygotes with yellow fruit (bb) – 25%.

b). by genotype – 1: 2: 1; by phenotype – 3: 1.