In the pumpkin, the disc-shaped fruit dominates over the globular. The homozygous sharavid pumpkin

In the pumpkin, the disc-shaped fruit dominates over the globular. The homozygous sharavid pumpkin was pollinated with the pollen of a heterozygous pumpkin that has a disc-shaped fruit, which would be the first generation hybrids.

Let us designate the gene that determines the development of a disc-shaped fruit in a pumpkin as C, then the gene for a spherical pumpkin fruit will be c.

Ball gourd is homozygous – сс. It produces sex cells with.

Heterozygous pumpkin Cc has disc-shaped fruits and produces C and C germ cells.

The F1 offspring will contain pumpkins with disc-shaped fruit (Cc, 50%) and with a spherical fruit (cc, 50%).

The second generation options depend on which F1 plants are being crossed. A total of 3 crossing options are possible. Let’s consider all of them.

Cc pumpkin with disc-shaped fruits and cc pumpkin with spherical fruits – the results are similar to F1;

Two pumpkins mop with spherical fruits. All formed germ cells are of the same type – p. All plants in F2 are cc, which corresponds to spherical fruits;

Two Mop pumpkins with disc-shaped fruits. Each forms sex cells of two types: C and c. F2 offspring are as follows: 25% – CC, 50% – Cc (disc-shaped fruits – 75%); 25% – сс (globular fruits.)