Column I | Column II | ||
A. | Sertoli cells | P. | Secretion of androgens |
B. | Leydig cells | Q. | Spermiogenesis |
C. | Uterine Myometrium | R. | Implantation |
D. | Uterine Endometrium | S. | Parturition |
A | B | C | D | |
1. | P | R | Q | S |
2. | R | S | P | Q |
3. | Q | P | S | R |
4. | S | Q | R | P |
1. | By the end of the second month |
2. | During the third month |
3. | By the end of the fourth month |
4. | During the fifth month |
1. | Foetal hypothalamus |
2. | Maternal pituitary |
3. | Fully developed foetus and placenta |
4. | Maternal hypothalamus |
Statement I: | The release of sperms into the seminiferous tubules is called spermiation. |
Statement II: | Spermiogenesis is the process of formation of sperms from spermatogonia. |
(a) | It results in the formation of haploid gametes. |
(b) | Differentiation of gamete occurs after the completion of meiosis. |
(c) | Meiosis occurs continuously in a mitotically dividing stem cell population. |
(d) | It is controlled by the Luteinising hormone (LH) and Follicle Stimulating Hormone (FSH) secreted by the anterior pituitary. |
(e) | It is initiated at puberty. |
1. (b), (c), and (e) only | 2. (c) and (e) only |
3. (b) and (c) only | 4. (b), (d) and (e) only |
How many Y-chromosomes are present in the 2nd polar body in human beings?
1. 01
2. 00
3. 23
4. 02