1. Which of the following are found in mammalian testes?

2.  Read the given statements (I-IV) and identify incorrect statement(s).

(I) The compartments in the testis are known as seminiferous tubule where spermatogonia are present.

(II) Scrotum maintains the temperature of the external genitalia lower to body temperature.

(III) The testes are situated outside the abdominal cavity while external genitalia is present inside the abdomen.

(IV) In a testicular lobule, one to three highly coiled seminiferous tubules are present.

3. Which of the following statements is not true?

4. In spermatogenesis, meiotic division occurs during conversion of

5. In spermatogenesis, 1st reduction division of chromosome occurs during conversion of

6. Which of the following are incorrect statements regarding spermatogenesis in humans?

(i) Spermatogonia multiply their number by meiotic division.

(ii) Each spermatogonia is diploid and contains 44 chromosomes.

(iii) Spermatogonia which undergo meiosis are called primary spermatocytes.

(iv) Sperms release from the seminiferous tubules by the process spermiogenesis.

Choose the correct option.

7. The given table shows differences between spermatogenesis and spermiogenesis. Select the incorrect option.

8. Select the incorrect statement.

9. Total number of follicles in each ovary of a normal young adult woman is about 60,000 to 80,000. But only 500 follicles get a chance to mature. What is the destiny of rest of the eggs?

10. Select the correct match.

Haploid                                                                           Diploid

(a) Secondary oocyte                                          Primary spermatocyte

(b) Secondary spermatocyte                             Secondary oocyte

(c) Primary oocyte                                               Secondary spermatocyte

(d) Ovum                                                               Spermatid

11. In the given T.S. of human ovary, identify A to E and select the correct option.

12. Before ovulation, the secondary oocyte forms a membrane called as

13. The following graph shows the levels of ovarian hormones during a menstrual cycle. What do 1 and 2 represent?

1                                                         2

(a) Progesterone                     Estrogen

(b) FSH                                     LH

(c) LH                                        FSH

(d) Estrogen                             Progesterone

14. The phase of menstrual cycle in humans that last for 7-8 days is

15. Select the incorrect statement regarding menstruation.

16. Select the mismatched pair.

(a) Menarche                                      - Start of menstrual cycle

(b) Ovulation                                       - Release of ovum

(c) LH surge                                         - Ovulation

(d) Ovarian hormones                        - LH and FSH

17. The corpus luteum secretes progesterone which is essential for maintenance of

18. Read the following statements about menstrual cycle and select two correct statements.

(i) Lack of menstruation may be indicative of pregnancy.

(ii) The changes in the ovary and the uterus are induced by changes in the levels of ovarian hormones only

(iii) LH surge induces ovulation.

(iv) If fertilisation occurs, corpus luteum degenerates immediately.

19. The second meiotic division of the mammalian ovum occurs

20. Presence of XX or XY chromosomes in zygote depends upon

21. The solid mass of 8-16 cells formed from zygote after successive mitotic divisions is called

22. Given below are four statements (i)-(iv) regarding embryonic development in humans.

(i) Cleavage occurs as the zygote moves through the uterus towards isthmus.

(ii) The trophoblast layer of blastocyst gets attached to the endometrium.

(iii) The blastomeres in the blastocyst are arranged into two layers, trophoblast and endometrium.

(iv) Cleavage divisions result in a solid ball of cells called morula.

Which of the above two statements are correct?

23. hCG, hPL and relaxin are produced in women

24. The first movements of the fetus and appearance of hair on its head are usually observed during which month of pregnancy?

25. .Read the following statements carefully and select the correct one(s).

(i) Relaxin is secreted in early phase of pregnancy.

(ii) Fetus shows movement first time in the 7th month of pregnancy.

(iii) Signals for parturition originate from fully developed fetus and placenta.

(iv) Embryo's heart is formed by the 3rd month of pregnancy.