31.

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

Turner's syndrome chromosome pattern is:

• XO

• XXX

• XYY

• XXY

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 number of chromosomes in Klinefelter's syndrome are :

• 47

• 46

• 45

• 44

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

Which of the following is a X-linked disease ?

• Tetany

• Colourblindness

• Xeroderma

• Hypertricosis

The condition in which there are more than two complete set of chromosome is called :

• polytene

• monoploidy

• polyploidy

• aneuploidy