Question

during which of the following phase(s) would you see nonhomologous chromosomes in the same cells?

before meiosis begins

metaphase i of meiosis

metaphase 2 of meiosis

only before metaphase 2

at all stages

Explanation:

• Before meiosis begins: Cells are diploid, containing both homologous and non - homologous chromosomes.
• Metaphase I of meiosis: Homologous chromosomes pair up (synapsis), but non - homologous chromosomes are also present in the cell.
• Metaphase II of meiosis: The cells are haploid (after homologous chromosomes separate in Anaphase I). But non - homologous chromosomes are still in the same cell (as each chromosome in Metaphase II is a non - homologous entity in the context of the haploid set).
• Only before metaphase 2 is incorrect because non - homologous chromosomes are also in the cell during Metaphase II.
• At all stages: Before meiosis (diploid cells with non - homologous chromosomes), during Metaphase I (diploid cells with non - homologous chromosomes), and during Metaphase II (haploid cells with non - homologous chromosomes within the haploid set)

Answer:

Before meiosis begins, Metaphase I of meiosis, Metaphase 2 of meiosis, At all stages