Question

How many cells are produced in an ovary through meiosis from one primary oocyte?

A) 1
B) 2
C) 3
D) 4

Answer 1

Following purberty, during each menstrual cycle, pituitary gonadotrophin stimulates completion of meiosis 1 the day before ovulation. In meiosis 1, a diploid cell becomes 2 haploid (23 chromosomes) daughter cells, each chromosome has two chromatids.

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Answer 2

Answer:

The correct answer is A) 1.

Meiosis is the process by which four haploid cells or gametes are produced by one diploid parent cell.

However, in females only one functional ovum or egg is produced from meiosis. The rest three cells or polar bodies get degenerated with time.

Primary oocyte (2n) is divided into secondary oocyte (n) and first polar body (n) after the completion of first meiotic division. Secondary oocyte is released in ovulation.

Meiosis II takes place in the polar body which forms another polar body.

Meiosis II is completed in the ovum only after fertilization with sperm. Completion of meiosis II results in the formation of ovum (n)and second polar body (n)

All three polar bodies get degenerate with time.