Question

meiosis does not alkways occur without any diffulties describe what occurs nondisjunction and the effect on the resuliting cells

Answer 1

Nondisjunction in meiosis I occurs during anaphase I when one pair of homologous chromosomes fails to separate. In this example, one cell with 5 chromosomes and one cell with 3 chromosomes are produced. Each cell undergoes meiosis II, resulting in two cells with n + 1, or 5, and two cells with n - 1, or 3.