Question

4 which event in meiosis increases genetic variation within a population? a chromosomes form pairs. b dna condenses to form chromosomes. c chromosomes duplicate themselves. d segments of chromosomes cross over.

Explanation:

Genetic variation in a population is increased by processes that create new combinations of genetic material. Chromosome pairing, DNA condensation, and chromosome duplication are standard meiotic events that do not introduce new genetic combinations. Chromosomal crossing over (homologous chromosomes exchanging genetic segments) creates novel allele combinations, directly increasing genetic variation.

Answer:

D. Segments of chromosomes cross over.