In the male human being, sperms contain autosomes and

1. Only one Y-chromosome

2. Only one X-chromosome

3. Both X and Y-chromosome

4. Either X or Y-chromosome

Which of the following is characteristic for identifying the structure of the mammalian testis?

In the vertebrates testes, for nourishment during spermiogenesis, the spermatids get attached to

The menstrual cycle begins with the casting off of

During parturition, the fetal ejection reflex triggers the release of:

Menstruation is triggered by an abrupt decline in the amount of:

1. Estrogen

2. Progesterone

3. LH

4. FSH

What structure gets implanted on the wall of the uterus during embryonic development?

1.		2.
3.		4.

Which of the structures shown in the following diagram contributes to the source of nutrition for the sperms ejaculated in the semen?

1. A

2. B

3. C

4. D

Fertilisation in humans is practically feasible only if

1. the ovum and sperms are transported simultaneously to ampullary region of the fallopian tube
2. the ovum and sperms are transported simultaneously to ampullary region of the cervix
3. the sperms are transported into cervix within 48 hrs of release of ovum in uterus
4. the sperms are transported into vagina just after the release of ovum in fallopian tube

Which of the following events is not associated with ovulation in human female?

1. Decrease in oestradiol

2. Full development of Graafian follicle

3. Release of secondary oocyte

4. LH surge