In which of the following one may observe variation in DNA?

(1) Fragmentation

(2) Budding

(3) Amitosis

(4) mutation

Sickle cell anaemia is a classic example of

(1) Point mutation

(2) silent mutation

(3) Frame shift mutation

(4) non sense mutation

Which of the following symbols represent consanguineous mating? 

(1)

(2)

(3)

(4)

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%

Pedigree analysis is not utilized to trace

(1) Specific trait

(2) Sex ratio

(3) Disease

(4) Abnormality

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%

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)

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

(1) 1

(2) 2

(3) 3

(4) 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