If meiosis did not occur during the formation of gametes, sexual reproduction would result in

the chromosome number would double with every generation.

Explanation:

The formation of haploid gametes occurs through a process of cell division called meiosis, which occurs in two consecutive stages called meiosis I and meiosis II.

Meiosis I is also called the reductive phase (R!), Because a diploid cell (2n) will give rise to two haploid cells (n).

In meiosis II, the two haploid cells (n) formed during the first stage (meiosis I) continue the division, giving rise, each one, to two more haploid cells (n) which will, at the end of the 2 stages, a total of four haploid cells (n). Meiosis II is called equational division (E!), Because dividing cells form daughter cells with the same number of chromosomes.

In short, if meiosis did not occur during gamete formation, there would be no reduction in chromosomes, the result of which would be that the number of chromosomes would double with each generation.