Question

unit 2.3 cell cycle, mitosis, meiosis quiz 2025 - 26
a genetic rearrangement often occurs during meiosis that increases genetic variation in offspring. during meiosis?
○ spontaneous mutations; during metaphase i
○ independent assortment; during telophase ii.
○ crossing over; during prophase i
○ separation of chromosomes; during anaphase i

Explanation:

Crossing - over is a genetic rearrangement in meiosis that occurs during prophase I. It involves the exchange of genetic material between homologous chromosomes, increasing genetic variation in offspring. Spontaneous mutations are not the main genetic rearrangement in meiosis. Independent assortment occurs during metaphase I, not telophase II. Separation of chromosomes in anaphase I is about chromosome movement, not a genetic - rearranging event for variation like crossing - over.

Answer:

C. crossing over; during prophase I