Which of the following will have 46 chromosomes?

Oogonia and spermatogonia

The correct answer is Option (4) → Oogonia and spermatogonia 

• Human somatic cells and germ cells (like oogonia and spermatogonia) are diploid (2n) and have 46 chromosomes.
• After meiosis I, the cells (secondary spermatocytes and secondary oocytes) are haploid (n) and have 23 chromosomes.
• After meiosis II, the cells (spermatids, spermatozoa, and ovum) are also haploid (n) with 23 chromosomes.

Evaluating the Options:

Spermatogonium and secondary spermatocytes

• Spermatogonium: Diploid (46 chromosomes)
• Secondary spermatocyte: Haploid (23 chromosomes)
• Not both 46.

Spermatids and spermatozoa

• Both are haploid (23 chromosomes) after meiosis II.
  Not 46.

Secondary oocyte and oogonia

• Secondary oocyte: Haploid (23 chromosomes)
• Oogonia: Diploid (46 chromosomes)
  Not both 46.

Oogonia and spermatogonia

• Oogonia: Diploid (46 chromosomes)
• Spermatogonia: Diploid (46 chromosomes)
  Both have 46 chromosomes.

Correct Answer:

Oogonia and spermatogonia (Both are diploid germ cells with 46 chromosomes.)

                                        Schematic representation of (a) Spermatogenesis; (b) Oogenesis