The correct answer is option 3, which states that genes are not found in pairs in gametes. Gametes are reproductive cells, such as sperm and eggs, which are involved in the process of sexual reproduction. When gametes combine during fertilization, they form a zygote, which is the beginning of a new individual.
In contrast to gametes, body cells (option 1) do contain genes in pairs. Most body cells in an organism have two sets of chromosomes, with each set being inherited from both parents. Thus, genes in body cells are present in pairs.
After fertilization, the ovary (option 2) does not have a direct relation to the presence of genes. Ovaries are reproductive organs that produce eggs, and the genes in eggs are inherited from the parent organisms.
Option 4, regarding 2ygotes, is incorrect. 2ygotes are not a recognized term in biology, and it is not relevant to the question.