Sex determination in humans takes place by
sex chromosomes of father
measurement of sperm
measurement of ovum
sex chromosomes of mother
A.
sex chromosomes of father
In humans, sex of offspring is determined at the time of fertilization. Man is heterogametic i.e. having two types of gametes 22 + X and 22 + Y and is responsible for sex determination whereas female is homogametic i.e. having single type of gametes 22 + XX.
Which of the following steroid sex hormone influenced secondary sex organs?
Progesterone
Oestrogen
LH
LTH
The term genetic engineering is used for :
blotting technique
RNA reaction technique
protein synthesis technique
recombinant technique
The condition in which there are more than two complete set of chromosome is called :
polytene
monoploidy
polyploidy
aneuploidy
The main cause of Edward syndrome, Patau syndrome and Down syndrome is :
mutation of gene
change in both autosomes and heterosomes
change in autosomes
change in heterosomes
The eggs of eutherian mammals are
mesolecithal type
microlecithal type
telolecithal type
megalecithal type
