Question

during meiosis, segments of nonsister chromatids can trade places. this recombination of maternal and paternal genetic material is a key feature of meiosis. during what phase of meiosis does recombination occur?

anaphase i.

prophase i.

meiosis ii.

metaphase i.

telophase i.

Explanation:

Recombination (crossing - over) of genetic material between nonsister chromatids occurs during prophase I of meiosis. In prophase I, homologous chromosomes pair up (synapsis), and segments of nonsister chromatids exchange genetic material. Anaphase I is about the separation of homologous chromosomes, meiosis II is similar to mitosis and doesn't involve recombination between maternal and paternal genetic material in the same way, metaphase I is about the alignment of homologous chromosome pairs, and telophase I is about the formation of two haploid cells.

Answer:

B. prophase I.