Question

For a primary spermatocyte in which 2n=16. What will be the total number of chromatids in each of the secondary spermatocytes?

• A. 32
• B. 8
• C. 16
• D. 24

Answer 1

The correct option is C 16

• Diploid primary spermatocytes undergo meiosis I and produce two secondary spermatocytes with chromosome numbers reduced to half.
• Each haploid secondary spermatocytes will have 8 chromosomes. However, chromatids, as produced by DNA replication during S phase, are still attached to the parental chromosome at the centromere.
• So, each secondary spermatocyte will have 16 chromatids.
  Thus, the correct answer is option C.