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
The genotype of a man having female sexual characters will be :
XXY
XYY
XO
XXX
A.
XXY
XXY genotype represents to Klinefelter's syndrome which is characterised by undeveloped testes, sparse body hair and mental retardation with some female characters.
XO genotype represents Turner's syndrome individual.
XXX genotype represents to super female whereas XYY represents to super male.
The condition in which there are more than two complete set of chromosome is called :
polytene
monoploidy
polyploidy
aneuploidy