286444
Which of the following group of cells involved in spermatogenesis represent haploid cells?
1 Spermatogonium
2 Primary spermatocyte
3 Both (a.)and (b.)
4 Secondary spermatocyte
Explanation:
(d) Secondary spermatocytes are the result of meiotic division, so they are the haploid ones.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286445
Select the option which shows the correct part of a sperm with its corresponding function.
1 Head: Stimulate Leydig cells to produce androgen hormone.
2 Neck: Essential for maturation and motility of sperm.
3 Middle piece: Produces energy from mitochondria for tail movement which facilitate sperm motility.
4 Tail: Help in fertilization with the help of enzyme present in acrosome.
Explanation:
(c)
NCERT Page-48 / N-32
Human Reproduction(NCERT)
286435
In the process of spermatogenesis, first maturation division is called
1 mitotic division
2 reduction division
3 amitotic division
4 None of the these
Explanation:
(b) The immature male germ cells or primary spermatocyte duplicates its DNA and subsequently undergoes meiosis I which is a reductional division to produce two haploid secondary spermatocytes.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286436
The LH surge from the anterior pituitary gland
1 occurs just prior to ovulation.
2 occurs just prior to menstruation.
3 stimulates an estrogen surge from the ovaries.
4 is responsible for follicle development in the uterus.
Explanation:
(a) The $\text{LH}$ surge is a peak burst of $\text{LH}$ from the anterior pituitary gland, which causes ovulation. It occurs in the middle of the ovarian cycle and is stimulated by the positive feedback of a high blood level of estrogen that is sustained for 48 to 50 hours. Although FSH and $\text{LH}$ stimulate follicle development at the beginning of a cycle, it is the LH surge that results in the rupture of the dominant follicle from the ovary.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286437
Which of the following statements about oogenesis is false?
1 The polar bodies degenerate after the second meiotic division.
2 The ovum produced is haploid.
3 The major growth phase of the primary oocyte occurs in prophase-I.
4 The primary oocyte is haploid.
Explanation:
(d) During oogenesis, the primary oocyte is diploid; after the first meiotic division into the secondary oocyte the cell becomes haploid.
286444
Which of the following group of cells involved in spermatogenesis represent haploid cells?
1 Spermatogonium
2 Primary spermatocyte
3 Both (a.)and (b.)
4 Secondary spermatocyte
Explanation:
(d) Secondary spermatocytes are the result of meiotic division, so they are the haploid ones.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286445
Select the option which shows the correct part of a sperm with its corresponding function.
1 Head: Stimulate Leydig cells to produce androgen hormone.
2 Neck: Essential for maturation and motility of sperm.
3 Middle piece: Produces energy from mitochondria for tail movement which facilitate sperm motility.
4 Tail: Help in fertilization with the help of enzyme present in acrosome.
Explanation:
(c)
NCERT Page-48 / N-32
Human Reproduction(NCERT)
286435
In the process of spermatogenesis, first maturation division is called
1 mitotic division
2 reduction division
3 amitotic division
4 None of the these
Explanation:
(b) The immature male germ cells or primary spermatocyte duplicates its DNA and subsequently undergoes meiosis I which is a reductional division to produce two haploid secondary spermatocytes.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286436
The LH surge from the anterior pituitary gland
1 occurs just prior to ovulation.
2 occurs just prior to menstruation.
3 stimulates an estrogen surge from the ovaries.
4 is responsible for follicle development in the uterus.
Explanation:
(a) The $\text{LH}$ surge is a peak burst of $\text{LH}$ from the anterior pituitary gland, which causes ovulation. It occurs in the middle of the ovarian cycle and is stimulated by the positive feedback of a high blood level of estrogen that is sustained for 48 to 50 hours. Although FSH and $\text{LH}$ stimulate follicle development at the beginning of a cycle, it is the LH surge that results in the rupture of the dominant follicle from the ovary.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286437
Which of the following statements about oogenesis is false?
1 The polar bodies degenerate after the second meiotic division.
2 The ovum produced is haploid.
3 The major growth phase of the primary oocyte occurs in prophase-I.
4 The primary oocyte is haploid.
Explanation:
(d) During oogenesis, the primary oocyte is diploid; after the first meiotic division into the secondary oocyte the cell becomes haploid.
286444
Which of the following group of cells involved in spermatogenesis represent haploid cells?
1 Spermatogonium
2 Primary spermatocyte
3 Both (a.)and (b.)
4 Secondary spermatocyte
Explanation:
(d) Secondary spermatocytes are the result of meiotic division, so they are the haploid ones.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286445
Select the option which shows the correct part of a sperm with its corresponding function.
1 Head: Stimulate Leydig cells to produce androgen hormone.
2 Neck: Essential for maturation and motility of sperm.
3 Middle piece: Produces energy from mitochondria for tail movement which facilitate sperm motility.
4 Tail: Help in fertilization with the help of enzyme present in acrosome.
Explanation:
(c)
NCERT Page-48 / N-32
Human Reproduction(NCERT)
286435
In the process of spermatogenesis, first maturation division is called
1 mitotic division
2 reduction division
3 amitotic division
4 None of the these
Explanation:
(b) The immature male germ cells or primary spermatocyte duplicates its DNA and subsequently undergoes meiosis I which is a reductional division to produce two haploid secondary spermatocytes.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286436
The LH surge from the anterior pituitary gland
1 occurs just prior to ovulation.
2 occurs just prior to menstruation.
3 stimulates an estrogen surge from the ovaries.
4 is responsible for follicle development in the uterus.
Explanation:
(a) The $\text{LH}$ surge is a peak burst of $\text{LH}$ from the anterior pituitary gland, which causes ovulation. It occurs in the middle of the ovarian cycle and is stimulated by the positive feedback of a high blood level of estrogen that is sustained for 48 to 50 hours. Although FSH and $\text{LH}$ stimulate follicle development at the beginning of a cycle, it is the LH surge that results in the rupture of the dominant follicle from the ovary.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286437
Which of the following statements about oogenesis is false?
1 The polar bodies degenerate after the second meiotic division.
2 The ovum produced is haploid.
3 The major growth phase of the primary oocyte occurs in prophase-I.
4 The primary oocyte is haploid.
Explanation:
(d) During oogenesis, the primary oocyte is diploid; after the first meiotic division into the secondary oocyte the cell becomes haploid.
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Human Reproduction(NCERT)
286444
Which of the following group of cells involved in spermatogenesis represent haploid cells?
1 Spermatogonium
2 Primary spermatocyte
3 Both (a.)and (b.)
4 Secondary spermatocyte
Explanation:
(d) Secondary spermatocytes are the result of meiotic division, so they are the haploid ones.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286445
Select the option which shows the correct part of a sperm with its corresponding function.
1 Head: Stimulate Leydig cells to produce androgen hormone.
2 Neck: Essential for maturation and motility of sperm.
3 Middle piece: Produces energy from mitochondria for tail movement which facilitate sperm motility.
4 Tail: Help in fertilization with the help of enzyme present in acrosome.
Explanation:
(c)
NCERT Page-48 / N-32
Human Reproduction(NCERT)
286435
In the process of spermatogenesis, first maturation division is called
1 mitotic division
2 reduction division
3 amitotic division
4 None of the these
Explanation:
(b) The immature male germ cells or primary spermatocyte duplicates its DNA and subsequently undergoes meiosis I which is a reductional division to produce two haploid secondary spermatocytes.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286436
The LH surge from the anterior pituitary gland
1 occurs just prior to ovulation.
2 occurs just prior to menstruation.
3 stimulates an estrogen surge from the ovaries.
4 is responsible for follicle development in the uterus.
Explanation:
(a) The $\text{LH}$ surge is a peak burst of $\text{LH}$ from the anterior pituitary gland, which causes ovulation. It occurs in the middle of the ovarian cycle and is stimulated by the positive feedback of a high blood level of estrogen that is sustained for 48 to 50 hours. Although FSH and $\text{LH}$ stimulate follicle development at the beginning of a cycle, it is the LH surge that results in the rupture of the dominant follicle from the ovary.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286437
Which of the following statements about oogenesis is false?
1 The polar bodies degenerate after the second meiotic division.
2 The ovum produced is haploid.
3 The major growth phase of the primary oocyte occurs in prophase-I.
4 The primary oocyte is haploid.
Explanation:
(d) During oogenesis, the primary oocyte is diploid; after the first meiotic division into the secondary oocyte the cell becomes haploid.
286444
Which of the following group of cells involved in spermatogenesis represent haploid cells?
1 Spermatogonium
2 Primary spermatocyte
3 Both (a.)and (b.)
4 Secondary spermatocyte
Explanation:
(d) Secondary spermatocytes are the result of meiotic division, so they are the haploid ones.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286445
Select the option which shows the correct part of a sperm with its corresponding function.
1 Head: Stimulate Leydig cells to produce androgen hormone.
2 Neck: Essential for maturation and motility of sperm.
3 Middle piece: Produces energy from mitochondria for tail movement which facilitate sperm motility.
4 Tail: Help in fertilization with the help of enzyme present in acrosome.
Explanation:
(c)
NCERT Page-48 / N-32
Human Reproduction(NCERT)
286435
In the process of spermatogenesis, first maturation division is called
1 mitotic division
2 reduction division
3 amitotic division
4 None of the these
Explanation:
(b) The immature male germ cells or primary spermatocyte duplicates its DNA and subsequently undergoes meiosis I which is a reductional division to produce two haploid secondary spermatocytes.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286436
The LH surge from the anterior pituitary gland
1 occurs just prior to ovulation.
2 occurs just prior to menstruation.
3 stimulates an estrogen surge from the ovaries.
4 is responsible for follicle development in the uterus.
Explanation:
(a) The $\text{LH}$ surge is a peak burst of $\text{LH}$ from the anterior pituitary gland, which causes ovulation. It occurs in the middle of the ovarian cycle and is stimulated by the positive feedback of a high blood level of estrogen that is sustained for 48 to 50 hours. Although FSH and $\text{LH}$ stimulate follicle development at the beginning of a cycle, it is the LH surge that results in the rupture of the dominant follicle from the ovary.
NCERT Page-47 / N-31
Human Reproduction(NCERT)
286437
Which of the following statements about oogenesis is false?
1 The polar bodies degenerate after the second meiotic division.
2 The ovum produced is haploid.
3 The major growth phase of the primary oocyte occurs in prophase-I.
4 The primary oocyte is haploid.
Explanation:
(d) During oogenesis, the primary oocyte is diploid; after the first meiotic division into the secondary oocyte the cell becomes haploid.