👉 In genetics, a hemizygous individual is one who does not have either of two or more pairs of chromosomes. This means that they only have one pair of chromosomes and are therefore considered an XY individual (sexes). Hemizygous individuals can be found in humans, but this term is often used to describe individuals with a single chromosomal pair from both parents, indicating that their gender is determined by the sex chromosomes, which are X or Y.
