Which mutation causes either the inclusion of an extra chromosome in offspring or the deletion of an entire chromosome?

Question

Responses
A deletiondeletion
B insertioninsertion
C crossing-overcrossing-over
D non-disjunction

Answer 1

The correct response is:

D non-disjunction

Non-disjunction is the failure of homologous chromosomes or sister chromatids to separate properly during cell division, leading to the inclusion of an extra chromosome in the offspring (trisomy) or the deletion of an entire chromosome (monosomy).