Assertion (A): In human males, 50 percent of sperms carry the X chromosome while the other 50 percent carry the Y.
Reason (R): Human males have XY sex chromosomes.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Â Sex Determination in Humans |
 84%
Level 1: 80%+
Hints
Spermatogenesis starts at the age of puberty due to a significant increase in the secretion of:
1. GnRH
2. FSH
3. LH
4. Testosterone
1. GnRH
2. FSH
3. LH
4. Testosterone
Subtopic: Â Seminiferous Tubules & Spermatogenesis |Â Spermiogenesis/Sperm Structure/Hormonal Regulation |
 78%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
The primary follicles in the ovary grow to become a fully mature Graafian follicle and simultaneously the endometrium of the uterus regenerates through proliferation during the:
| 1. | menstrual phase of the menstrual cycle |
| 2. | follicular phase of the menstrual cycle |
| 3. | ovulatory phase of the menstrual cycle |
| 4. | luteal phase of the menstrual cycle |
Subtopic: Â Menstrual Cycle: Pre Ovulatory Phase |
 84%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Identify the incorrect statement:
| 1. | The seminiferous tubules of the testis open into the vasa efferentia through the rete testis. |
| 2. | The vasa efferentia leave the testis and open into the epididymis located along the posterior surface of each testis. |
| 3. | The epididymis leads to the vas deferens that ascend to the abdomen and loop over the urinary bladder. |
| 4. | The epididymis receives a duct from the seminal vesicle and opens into the urethra as the ejaculatory duct. |
Subtopic: Â Male Reproductive System |
 71%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
Each ejaculatory duct is formed by the union of:
| 1. | the vas deferens with the duct of the bulbourethral gland |
| 2. | the vas deferens with the duct of the seminal vesicle |
| 3. | the epididymis and the vas deferens |
| 4. | the duct of bulbourethral gland and the urethra |
Subtopic: Â Male Reproductive System |
 80%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Essential for the maintenance of the endometrium, what hormone is secreted in large amounts by the corpus luteum in a non-pregnant female?
1. hCG
2. Progesterone
3. Estrogen
4. LH
1. hCG
2. Progesterone
3. Estrogen
4. LH
Subtopic: Â Menstrual Cycle: Luteal Phase |
 87%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Regarding early embryonic development in humans:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | The first movements of the foetus and appearance of hair on the head are usually observed during the third month. |
| II: | By the end of about 24 weeks, the body is covered with fine hair, eye-lids separate, and eyelashes are formed. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Â Embryonic Development till Gastrulation |
 78%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
Chorionic villi are derived from:
| 1. | Trophoblast cells | 2. | Granulosa cells |
| 3. | Theca cells | 4. | Maternal tissue |
Subtopic: Â Embryonic Development till Gastrulation |
 86%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
A plasma membrane:
| 1. | envelops only the acrosome of sperm |
| 2. | envelops only the mid piece of sperm |
| 3. | envelops the whole body of sperm |
| 4. | does not envelop any part of the sperm at all |
Subtopic: Â Spermiogenesis/Sperm Structure/Hormonal Regulation |
 78%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
At puberty:
| 1. | about 30,000-40,000 primary follicles are left in each ovary |
| 2. | about 30,000-40,000 primary follicles are left in both ovaries |
| 3. | about 60,000-80,000 primary follicles are left in each ovary |
| 4. | about 1,00,000 primary follicles are left in both ovaries |
Subtopic: Â oogenesis |
 90%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
© 2025 GoodEd Technologies Pvt. Ltd.