abnormal gametes + anomaly of any mature reproductive cell, ovum or spermatozoon, capable of fusing with a cell of similar origin, but opposite sex, to produce a zygote.

What is abnormality in gamete formation?

Chromosomal anomalies: abnormalities occur during meiosis when distribution of the chromosomal material between the gametes takes place. ANOMALIES INVOLVING THE AUTOSOMES (SOMATIC CHROMOSOMES): meiotic division includes a stage of chromosome pairing.

What is chromosome abnormality?

A chromosomal anomaly is a change to a child’s genetic material or DNA, which alters the baby’s development before birth. This can include extra, missing or irregular chromosomes.