Sex determination in humans takes place by
sex chromosomes of father
measurement of sperm
measurement of ovum
sex chromosomes of mother
The term genetic engineering is used for :
blotting technique
RNA reaction technique
protein synthesis technique
recombinant technique
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
Which of the following steroid sex hormone influenced secondary sex organs?
Progesterone
Oestrogen
LH
LTH
B.
Oestrogen
Oestrogen is a steroid hormone secreted by Graffian follicle. It is responsible for development of secondary sexual characters in female such as thin voice, complete development of ovary, oviduct, mammary gland, uterus and vagina. Therefore, it is a steroid sex hormone that influences secondary sex organs.
The condition in which there are more than two complete set of chromosome is called :
polytene
monoploidy
polyploidy
aneuploidy