I: | A count of 10 million sperms per ml of semen |
II: | 60 percent sperms have normal shape and size |
III: | 60 percent sperms show vigorous motility |
1. | Only II | 2. | Only I and II |
3. | Only II and III | 4. | I, II and III |
I. | connects the efferent ducts from the rear of each testicle to its vas deferens |
II. | stores sperms |
III. | is the place of final maturation of sperms |
I: | stimulates primary spermatocytes to undergo the first division of meiosis, to form secondary spermatocytes. |
II: | enhances the production of androgen-binding protein by the Sertoli cells of the testes |
1. | Only I | 2. | Only II |
3. | Both I and II | 4. | Neither I nor II |
(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 |
A: | Spermatogonia have 46 chromosomes and always undergo meiotic cell division |
B: | Primary spermatocytes divide by mitotic cell division |
C: | Secondary spermatocytes have 23 chromosomes and undergo second meiotic division |
D: | Spermatozoa are transformed into spermatids |
Statement I: | Secretions of epididymis, vas deferens, seminal vesicle and prostate are essential for maturation and motility of sperms. |
Statement II: | The functions of male sex accessory ducts and glands are maintained by the gonadotropins. |
1. | Oogonia | 2. | First polar body |
3. | Second polar body | 4. | Primary oocyte |
Granulosa cells | Zona pellucida | |
1. | 4 | 6 |
2. | 3 | 4 |
3. | 3 | 6 |
4. | 4 | 7 |
Assertion (A): | Testes in males and ovaries in females are the primary sex organs. |
Reason (R): | The primary sex organs are those that are located within the pelvic cavity and the secondary sex organs are the external genitalia. |
1. | Both (A) and (R) are True and (R) correctly explains (A). |
2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |