If both parents are carriers for thalassemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?

1.	50%	2.	25 %
3.	100%	4.	no chance

A man whose father was colour blind marries a woman who had a colour blind mother and a normal father. What percentage of male children of this couple will be colour blind?

1. 25%

2. 0%

3. 50%

4. 75%

A human female with Turner's syndrome:

1. has 45 chromosomes with XO

2. has one additional chromosome.

3. exhibit male character

4. is able to produce children with a normal husband.

Which of the following statements is not true of two genes that show 50% recombination frequency?

The incorrect statement with regard to Haemophilia is:

A normal-visioned man whose father was color blind marries a woman whose father was also colorblind. They have their first child as a daughter. What are the chances that this child would be colorblind?

1. 100%

2. 0%

3. 25%

4. 50%

F₂ generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1: 2: 1. It represents a case of:

1. Co-dominance

2. Dihybrid crosses

3. Monohybrid crosses with complete dominance

4. Monohybrid crosses with incomplete dominance

Which one of the following cannot be explained on the basis of Mendel's Law of Dominance?

The genotype of a plant showing the dominant phenotype can be determined by:

1. test cross

2. dihybrid cross

3. pedigree analysis

4. back cross