If two persons with' AB' blood group marry and have the sufficiently large number of children, these children could be classified as 'A' blood group: 'AB' blood group: 'B' blood group in 1: 2: 1 ratio. The modern technique of protein electrophoresis reveals the presence of both' A' and 'B' type proteins in 'AB' blood group individuals. This is an example of:
1. Incomplete dominance
2. Partial dominance
3. Complete dominance
4. Codominance

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:

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

ABO blood groups in humans are controlled by the gene I. It has three alleles – I^A I^B and i. Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur?

1. Three

2. One

3. Four

4. Two