Does Nondisjunction Occur in Males?

Theoretically, non-disjunction may occur in both the male and female germ cells at either the first or second meiotic division and may give rise to a considerable variety of non-disjunctional types in the progeny.

Does nondisjunction occur in sperm?

Nondisjunction during sperm production can also result in aneuploidy of sex chromosomes. To detect chromosomal aneuploidies, the number, types, and appearance of chromosomes is determined by karyotyping, a pictorial display of chromosomes photographed through the microscope.

Why does nondisjunction occur more in females?

We speculated that for young women then, the most frequent risk factor for MI nondisjunction is the presence of a telomeric exchange. As a woman ages, her meiotic machinery is exposed to an accumulation of age-related insults, becoming less efficient/more error-prone.