Question

What chromosome-number change occurs during Meiosis I in oogenesis?

Options

• n → 2n (23 → 46)

• 2n → n (46 → 23)

• 2n → 2n (46 → 46)

• n → n (23 → 23) during mitosis

Answer 1

Meiosis I halves the chromosome count in the primary oocyte. Thus, a diploid cell with 46 chromosomes produces haploid products with 23 chromosomes.