Which among the following has 23 chromosomes?

Options

A. Spermatogonia
B. Zygote
C. Secondary oocyte
D. oogonia

Answer

C

Explanation

Secondary oocyte has 23 chromosomes as it is a product of meiotic division of primary oocyte during oogenesis in the ovary. Oogenesis is initiated at the foelat ovary in the early embryonic stage of female and a fixed number of oogonia (gamete mother cells) are formed at before the birth of the female child no more oogonia are added after birth.
Spermatogonia is the immature male germ cells that prodduce sperms. Each spermatogonium is diploid (2n) and cantain 46 chromosomes.
The haploid nucleus of the sperms and that of the ovum fuse together to from a diploid (2n) zygote i.e., 46 chromosomes.
During foetal development, ceration cells in the germinal epitheliu of the ovary undergo mitotic division, producing undifferentialted germ cells called oogonia. The oogonia is diploid (2n) and contanis 46 chromosomes.