Q. No.
Lactation after child birth is possible due to decrease in the secretion of:
1. HCG
2. oxytocin
3. FSH and LH
4. estrogen and progesterone
1. HCG
2. oxytocin
3. FSH and LH
4. estrogen and progesterone
The initial phase of the cortical reaction leads to:
1. slow block to polyspermy
2. fast block to polyspermy
3. formation of pronuclei
4. completion of acrosome reaction
Identify the incorrect statement:
1. Spermatogenesis begins at puberty.
2. Secondary spermatocyte has 23 chromosomes.
3. Oogenesis lasts only from puberty until menopause
4. oogenesis begins in fetal life
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Identify the incorrect statement:
| 1. | Granulosa cells produce estrogen |
| 2. | LH surge is due to peak secretion of progesterone |
| 3. | The corpus luteum secretes both progesterone and estrogen along with inhibin |
| 4. | FSH acts directly on granulosa cells |
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The testes of a pre-pubertal boy will have:
1. spermatocytes
2. spermatozoa
3. spermatogonia
4. spermatid
The dilated end of vas deferens are called:
1. corpus
2. seminal vesicle
3. ampulla
4. tubuli recti
Human embryos will develop into female by default due to:
1. presence of an X chromosome
2. an ovarian determining factor
3. presence of a Y chromosome
4. lacks of Y sex chromosome
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A big advantage of the evolution of internal fertilization is:
| 1. | need for large number of gametes to be produced |
| 2. | fetuses to be kept warm, moist, nourished, and protected inside the mother |
| 3. | synchronous release of gametes by both sexes |
| 4. | prevention of dehydration of gametes |
In vertebrate eggs with large yolks, cleavage is described as _______ and results in a ________ on top of the yolk.
1. meroblastic/trophoblast
2. holoblastic/blastodisc
3. meroblastic/blastodisc
4. meroblastic/blastomere
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