In tomato, the spherical shape of the fruit dominates over the pear-shaped, the red color of the fruit over the yellow.

In tomato, the spherical shape of the fruit dominates over the pear-shaped, the red color of the fruit over the yellow. What splitting by phenotype and genotype can be revived by self-pollination of a tomato plant homozygous for pear-shaped fruit and heterozygous for fruit color?

Let’s designate the gene that determines the spherical shape of tomato fruits as P, then the pear-shaped gene will be p.

Let’s designate the gene for red color of tomatoes as O, then the gene for yellow color will be about.

A tomato homozygous for pear-shaped and heterozygous for color, according to the introduced designations, will be written as ppOo. Its fruits will be red in color. Such a plant produces sex cells pO and p0.

Self-pollination will result in offspring of the following type:

tomatoes with red pear-shaped fruits (ppOo) – 50%;

tomatoes with yellow pear-shaped fruits (roo) – 50%.

Answer: both by phenotype and by genotype among the offspring of this tomato, the splitting will be 1: 1.