Meiosis involves which sequence?

Meiosis involves which sequence?

• A. Chromosomes duplicate, exchange information, cell splits, splits again
• B. Chromosomes duplicate, cell splits
• C. DNA replication occurs
• D. Meiosis occurs in the cell

Answer: (A)

Meiosis follows a sequence that both reshapes genetic material and reduces chromosome number. First, chromosomes duplicate to form sister chromatids. Then homologous chromosomes pair up and crossing over occurs, exchanging genetic information between them. Next, the cell undergoes the first division, separating the homologous chromosomes into two cells. Finally, a second division splits the sister chromatids, producing four haploid cells. This sequence—duplication, exchange of genetic information, first division, second division—best captures how meiosis progresses.

Meiosis follows a sequence that both reshapes genetic material and reduces chromosome number. First, chromosomes duplicate to form sister chromatids. Then homologous chromosomes pair up and crossing over occurs, exchanging genetic information between them. Next, the cell undergoes the first division, separating the homologous chromosomes into two cells. Finally, a second division splits the sister chromatids, producing four haploid cells. This sequence—duplication, exchange of genetic information, first division, second division—best captures how meiosis progresses.