Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): In humans, sex is determined at the time of fertilization.
Reason (R): The Y chromosome is the male determining factor in humans.
 In the light of the above statements, choose the most appropriate answer from the options given below:
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. Both (A) and (R) are False.

Subtopic:  Fertilization |
 59%
From NCERT
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Which of the following is not a male accessory sex gland?
1. Bulbourethral gland
2. Testis
3. Prostate
4. Seminal vesicles

Subtopic:  Male Reproductive System |
 88%
From NCERT
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Ovaries are the primary sex organs in human females because they:
I. Produce the female gamete
II. Produce the hormone that regulates the development of secondary sexual characters
1. Both I and II
2. Only I
3. Only II
4. None

Subtopic:  Female Reproductive System-1 | Female Reproductive System-2 |
 85%
From NCERT
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FSH:
1. Acts on Sertoli cells and stimulates secretion of some factors that help in spermiogenesis
2. Acts on Sertoli cells and inhibits secretion of some factors that help in spermiogenesis
3. Acts on Leydig cells and stimulates secretion of some factors that help in spermiogenesis
4. Acts on Leydig cells and inhibits secretion of some factors that help in spermiogenesis

Subtopic:  Seminiferous Tubules & Spermatogenesis | Spermiogenesis/Sperm Structure/Hormonal Regulation |
 82%
From NCERT
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The functions of male sex accessory ducts and glands are maintained by:
1. Hypothalamic releasing hormone
2. Pituitary gonadotropins
3. Adrenal cortex steroids
4. Testicular androgens

Subtopic:  Seminiferous Tubules & Spermatogenesis | Spermiogenesis/Sperm Structure/Hormonal Regulation |
 68%
From NCERT
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At the birth of the female child, the follicles in her ovaries contain:

1. Primary oocytes that have been arrested at the S phase of the cell cycle
2. Primary oocytes that have been arrested at the Prophase I of Meiosis I
3. Secondary oocytes that have been arrested at the Prophase I of Meiosis I
4. Secondary oocytes that have been arrested at the Metaphase II of Meiosis II

Subtopic:  oogenesis |
 79%
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What is released at ovulation?
1. Primary oocyte arrested at meiosis I
2. Primary oocyte arrested at meiosis II
3. Secondary oocyte arrested at meiosis I
4. Secondary oocyte arrested at meiosis II

Subtopic:  oogenesis |
 56%
From NCERT
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LH surge:

1. is a sudden dramatic increase in the levels of LH during the early part of the menstrual cycle and is responsible for ovulation
2. is a sudden dramatic decrease in the levels of LH during the early part of the menstrual cycle and is responsible for ovulation
3. is a sudden dramatic decrease in the levels of LH during the mid-menstrual cycle and is responsible for ovulation
4. is a sudden dramatic increase in the levels of LH during the mid-menstrual cycle and is responsible for ovulation
Subtopic:  Menstrual Cycle: Pre Ovulatory Phase | Menstrual Cycle: Luteal Phase |
 75%
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What happens when a sperm enters the cytoplasm of the secondary oocyte?
1. Release of first polar body
2. Completion of meiosis II
3. Degeneration of polar bodies
4. Dissolution of zona pellucida

Subtopic:  Fertilization |
 79%
From NCERT
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In humans, the sex of the baby is determined:

1. At the time of fertilization and by the father
2. At the time of fertilization and by the mother
3. At the time of implantation and by the father
4. At the time of implantation and by the mother
Subtopic:  Fertilization |
 88%
From NCERT
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