If a normal female has a sickle cell anaemic child what can be the probable genotype of that gene in that female?

(1) AA

(2) aa

(3) Aa

(4) both (1) and (3)

If the female has three boys in her first three pregnancy. What are the chances of getting female child this time?

(1) 25%

(2) 50%

(3) 75%

(4) 20%

If a haemophilic female who marries a normal male gives birth to a male child, then what are the chances of boy being normal? (a hypothetical situation but it won’t happen practically)

 (1) 0%

 (2) 50 %

 (3) 25%

 (4) 75%

In ABO blood grouping how many genotypes show co-dominance? 

(1) 1

(2) 2

(3) 3

(4) 4

Pedigree analysis is not utilized to trace

(1) Specific trait

(2) Sex ratio

(3) Disease

(4) Abnormality

Which of the following symbols represent consanguineous mating? 

(1)

(2)

(3)

(4)

In the given pedigree chart select the correct statement:

(1) A & B are twins

(2) A is younger than B

(3) B is younger than A

(4) Can’t determine the age of A & B

Which of the following is the sex linked disease? 

(1) Sickle cell anaemia

(2) Haemophilia

(3) Cystic fibrosis

(4) Phenylketonuria

Mendelian disorders are caused by

(1) Mutation in the single chromosome

(2) Mutation in the single gene

(3) Polyploidy

(4) Aneuploidy

Myotonic dystrophy is

(1) Autosomal recessive trait

(2) Autosomal dominant trait

(3) X- linkeddominant trait

(4) X- linked recessive trait