We call this a heterozygous form. Thus F1 is again a generation of hybrids or heterozygotes. In pea plants, tall stems and red flowers are dominant variants over short stems and white flowers. All living things are composed of cells. Common features of cells.
Cells can divide into two exact copies.
Mitosis produces diploid cells. Meiosis occurs in the sexual organs of complex plants and animals and results in the production of specialized sex cells called gametes. Humans have 23 different chromosome pairs. E.g. the Pea plant. Recombination - A chromosome pair not only separates into single strands when forming gametes during meiosis, but it also exchanges sections of each strand back and forth during meiosis.