The substitution of sixth codon of the beta globin chain from GAG to GUG cause a condition called

a.Phenyl ketonuria           b.Haemophilia              c.Sickle cell anaemia                        d.Muscular dystrophy

Down’s syndrome is seen in both sexes.Why?

Give an example of autosome linked recessive blood disease

In a cross in which both phenotypic and genotypic ratios  are same and is 1:2:1

a) Name the phenomenon.

b) Give one example

a)Define pleiotropy

b)Give one example

Haplo-diploid sex determination system is found in -------------------

Distinguish between inheritance and variation.

Give an example of Indian cow breed which developed from the ancestors  of wild cow by artificial selection and domestication.

ABO blood group in man is example for both Multiple alleles and co-dominance .Explain 

Howmany alles are responsible for the following

(a).ABO blood group

(b). Starch synthesis in pea seeds

Sex determination in

a. Grass hopper : XX-XO

b.Man : ..................

The blood group of father and mother is ‘O’.They have two sons .

a.Find out the possible blood groups of the children

b.Is there any change in the blood group of the children of opposite sex?

Give one example for the following

a. Inborn errors of metabolism

b .Sex linked recessive trait

c.Autosomal dominant trait

Complete the following

44A + XXY : ..................a..................... :: 44A + XO : Turner’s syndrome.

In domestic fowl (Birds) the female individuals determine the sex of the offspring. Do you agree ? Give reason

Mention the type of sex determination in Man .

Mention T H Morgan’s contributions in genetics