The fruits of tomatoes are round and pear-shaped. The round gene is dominant.

The fruits of tomatoes are round and pear-shaped. The round gene is dominant. What offspring should be expected from crossing pear-shaped plants and genozygous plants with round fruits.

Let’s denote the gene responsible for the shape of the ball – G, and for the pear-shaped – g. Crossbreeding can be schematically written as follows:
P gg X Gg
One parent (P) is pear-shaped (gg), the other is spherical (Gg).
Offspring:
gG and gg
By crossing two plants with different fruit shapes, 50% of the seeds will receive the globular fruit gene, and 50% will receive the pear-shaped fruit gene. Each half of the offspring will be similar to one of the parents.