Embryonic Development Till Gastrulation

A change in the amount of yolk and its distribution in the egg will affect:

1. formation of zygote

2. pattern of cleavage

3. number of blastomeres produced

4. fertilization

Which one of the following statements about morula in humans is correct:

1.	It has almost equal quantity of cytoplasm as an uncleaved zygote but much more DNA
2.	It has far less cytoplasm as well as less DNA than an uncleaved zygote
3.	It has more or less equal quantity of cytoplasm and DNA as in uncleaved zygote
4.	It has more cytoplasm and more DNA than an uncleaved zygote

In a normal pregnant woman, the amount of total gonadotropin activity was assessed. The result expected was:

1.	High level of circulating FSH and LH in the uterus to stimulate implantation of the embryo
2.	High level of circulating HCG to stimulate endometrial thickening
3.	High levels of FSH and LH in uterus to stimulate endometrial thickening
4.	High level of circulating HCG to stimulate oestrogen and progesterone synthesis

Match Column-I with Column-II and select the correct option using the codes given below:

	Column-I		Column-II
A.	Mons pubis	1.	Embryo formation
B.	Antrum	2.	Sperm
C.	Trophectoderm	3.	Female external genitalia
D.	Nebenker	4.	Graafian follicle

Several hormones like hCG, hPL, oestrogen, progesterone are produced by:

1.	ovary	2.	placenta
3.	fallopian tube	4.	pituitary

The amnion of mammalian embryo is derived from?

1.	ectoderm and mesoderm	2.	endoderm and mesoderm
3.	mesoderm and trophoblast	4.	ectoderm and endoderm