Question

How many of the given statements are incorrect?
A. The ovaries are located on each side of the lower abdomen.
B. Mons pubis is a cushion of fatty tissue covered by skin and pubic hair.
C. A primary spermatocyte completes the second meiotic division leading to the formation of two equal, haploid cells called secondary spermatocytes, which have only 23 chromosomes each.
D. The secondary follicles get surrounded by more layers of granulosa cells and a new theca; they are called tertiary follicles.

• A. None
• B. One
• C. Two
• D. Three

Answer 1

Answer: (C)

Statements C and D are incorrect.
C. Some spermatogonia (termed as primary spermatocytes) periodically undergo meiosis. A primary spermatocyte completes meiosis-I (reduction division) and gives rise to 2 equal-sized cells called secondary spermatocytes (n = 23). Both secondary spermatocytes undergo meiosis-II (equational division) to produce 2 equal spermatids (n) each.
D. Primary follicles are converted to secondary follicles by getting surrounded by a few more layers of granulosa cells and a new theca. Following changes occur in the secondary follicle after which it is immediately converted to tertiary follicle:
I. Development of a fluid-filled cavity called antrum.
II. Differentiation of Theca layer into theca interna (inner) and theca externa (outer).
III. Primary oocyte grows in size, completes meiosis-I (unequal division) resulting in the formation of a large haploid secondary oocyte and a small first polar body. Tertiary follicle changes into the mature follicle (Graafian follicle).