Question

which statements describe crossing over? occurs between homologous chromosomes separates chromosome pairs into gametes occurs between duplicated sister chromatids increases genetic variation across gametes

Explanation:

Crossing - over occurs between homologous chromosomes during meiosis. It involves the exchange of genetic material. This process increases genetic variation across gametes. Separating chromosome pairs into gametes is part of the overall process of meiosis (specifically during anaphase I) but is not the description of crossing - over. Crossing - over occurs between homologous chromosomes, not between duplicated sister chromatids.

Answer:

• occurs between homologous chromosomes
• increases genetic variation across gametes