ZoologyThe number of chromosomes in oogonium, primary oocyte, secondary oocyte, ovum and zygote in human beings are respectively

The number of chromosomes in oogonium, primary oocyte, secondary oocyte, ovum and zygote in human beings are respectively

A
46, 46, 23, 23 and 46
B
46, 23, 23, 23 and 46
C
46, 46, 23, 23 and 23
D
46, 46, 46, 23 and 46

Solution:

The oogonium and the primary oocyte are diploid (46 chromosomes). The primary oocyte undergoes meiosis I. The secondary oocyte and ovum are haploid (23 chromosomes). The zygote, which is formed by the union of a haploid sperm and a haploid ovum is diploid (46 chromosomes).