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

1. Fragmentation

2. Budding

3. Amitosis

4. mutation

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%

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

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

Myotonic dystrophy is

1. Autosomal recessive trait

2. Autosomal dominant trait

3. X- linkeddominant trait

4. X- linked recessive trait

Which of the following is least probable? 

1. Female child with Sickle cell anaemia

2. Male child with haemophilia

3. Carrier female for haemophilia

4. Female child with haemophilia

Which of the following genotypes could cause Sickle cell anaemia? 

1. Hbˢ + Hbᴬ

2. Hbᴬ+ Hbᴬ

3. Hbˢ + Hbˢ

4. Both ‘A’ and ‘C’.

Study the pedigree chart given below to identify the disorder

1.Sickle cell anaemia

2. Haemophilia

3. Myotonic dystrophy

4. Phenylketonuria

What does the given pedigree chart shows? 

1. Sex-linked recessive trait

2. Sex-linked dominant trait

3. Inheritance of Sickle cell anaemia

4. Inheritance of autosomal dominant trait