A gene may have more than two alternative forms occupying the same locus on a chromosome such alleles are known as multiple alleles and the phenomenon is turned as multiple allelism. ABO blood group has 3 alleles. I^O, I^A or A, I^B or B.

Correct Option: C

A gene may have more than two alternative forms occupying the same locus on a chromosome such alleles are known as multiple alleles and the phenomenon is turned as multiple allelism. ABO blood group has 3 alleles. I^O, I^A or A, I^B or B.

On mating tt with Tt, 50% individual offsprings are recessive and 50% are heterozygous dominant.

Correct Option: B

On mating tt with Tt, 50% individual offsprings are recessive and 50% are heterozygous dominant.

IAIO × IAIB gives us the following genotypes I^AI^A, I^OI^B, I^AI^B.

Correct Option: D

IAIO × IAIB gives us the following genotypes I^AI^A, I^OI^B, I^AI^B.

Allelomorphs control different expressions or traits of the same character.

Correct Option: B

Allelomorphs control different expressions or traits of the same character.

Gregor Johann Mendel formulated the laws of heredity and is regarded as the father of genetics.

Correct Option: B

Gregor Johann Mendel formulated the laws of heredity and is regarded as the father of genetics.