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

Boy born to a physically normal couple has been diagnosed with a genetic disorder, this could be

(1) Y- linked trait.

(2) Autosomal dominant trait

(3) X- linkeddominant trait

(4) X- linked recessive trait

Which of the following disorder is associated with Queen Victoria?

(1) Sickle cell anaemia

(2) Haemophilia

(3) Huntington's Disease

(4) Myotonic dystrophy