Which process results in two new nuclei with the same chromosome number as the parent nucleus?

Which process results in two new nuclei with the same chromosome number as the parent nucleus?

• A. Mitosis
• B. Meiosis
• C. Binary fission
• D. Sperm development

Answer: (A)

Two new nuclei with the same chromosome number as the parent come from a division that preserves the chromosome set. In this process, the cell first replicates its DNA, then the duplicated chromosomes are equally separated into two new nuclei, so each daughter nucleus ends up with the identical complement of chromosomes as the original. This supports growth and tissue repair by keeping chromosome number constant across divisions. Meiosis, by contrast, reduces the chromosome number and produces four haploid cells, not two identical nuclei. Binary fission involves bacteria and the division of a single chromosome into two new cells, but it does not produce true nuclei in the same way as eukaryotic mitosis. Sperm development is part of meiosis, leading to haploid gametes rather than two diploid nuclei.

Two new nuclei with the same chromosome number as the parent come from a division that preserves the chromosome set. In this process, the cell first replicates its DNA, then the duplicated chromosomes are equally separated into two new nuclei, so each daughter nucleus ends up with the identical complement of chromosomes as the original. This supports growth and tissue repair by keeping chromosome number constant across divisions.

Meiosis, by contrast, reduces the chromosome number and produces four haploid cells, not two identical nuclei. Binary fission involves bacteria and the division of a single chromosome into two new cells, but it does not produce true nuclei in the same way as eukaryotic mitosis. Sperm development is part of meiosis, leading to haploid gametes rather than two diploid nuclei.