In curly pumpkin, the white color of the fruit dominates over the yellow. What will the appearance of the first
In curly pumpkin, the white color of the fruit dominates over the yellow. What will the appearance of the first and second generation look like when crossing a pumpkin homozygous for white with a yellow pumpkin.
Let the gene for the white color of the curly pumpkin be W, and the gene for the yellow color of the fruit be w.
A pumpkin homozygous for white color will have the WW genotype and produce W.
Yellow gourd will be ww because homozygosity is required for the phenotypic realization of this trait. This pumpkin produces germ cells of the same type – w.
In F1 we get the offspring with the Ww genotype, all the fruits of which will be white.
These plants will already produce 2 types of germ cells – w and W.
When crossing them together, we get the F2 offspring, including the options:
heterozygous pumpkins with white fruit (Ww) – 50%;
homozygous pumpkins with yellow fruit (ww) – 25%;
homozygous pumpkins with white fruit (WW) – 25%.