The red color of the strawberry berry incompletely dominates over the white one, and the normal calyx over
The red color of the strawberry berry incompletely dominates over the white one, and the normal calyx over the leaf one, determine the possible phenotypes of the offspring obtained from crossing strawberry plants with pink berries and an intermediate calyx shape with each other and their probability.
With incomplete dominance, the manifestation of a trait in a heterozygote is intermediate.
A – red color of the berry,
a – white color. Aa is pink.
B – normal calyx,
b – leaf, Bb – intermediate calyx.
Crossing scheme:
Parents: AaBb x AaBb.
Gametes: AB, Ab, aB, ab x AB, Ab, aB, ab.
Offspring: 16 genotypes in total.
1 AABB (red berries, normal calyx) (1/16 probability), 2 AABb (red berries, intermediate calyx) (1/8), 2 AaBB (pink berries, normal calyx) (1/8), 4 AaBb (pink berries, intermediate calyx) (1/4), 1 AAbb (red berries, calyx) (1/16), 2 Aabb (pink berries, calyx) (1/8), 1 aaBB (white berries, normal calyx) (1/16), 2aaBb (white berries, intermediate calyx) (1/8), 1 aabb (white berries, leaf calyx) (1/16).