Question

Differentiate between dominance, co-dominance and incomplete dominance.​

Answer 1

Answer:

Law of dominance states that in a pair of alleles one is a dominant character and other is a recessive character. Only the dominant character will show itself in the heterozygous trait. The recessive character can show itself when it is present in a homozygotic condition.

Codominance is when both the allele express themselves in the hybrid. 1:2: 1 ratio is present in both genotype as well as the phenotype. There is no mixing of characters of the two alleles.

In human blood grouping system there are three alleles a, b, o.

The 3 alleles of human blood group are said to be codominant because both are expressed in the phenotype A and B.

Answer 2

• Dominance, in genetics, greater influence by one of a pair of genes (alleles) that affect the same inherited character.

• Incomplete dominance is when the phenotypes of the two parents blend together to create a new phenotype for their offspring. An example is a white flower and a red flower producing pink flowers.

• Codominance is when the two parent phenotypes are expressed together in the offspring.