8
4
8
8
A condition where both the alleles of a gene are expressed equally in heterozygous state. Neither allele is dominant
to the other. For example, in the ABO blood group system (AB blood group) alleles for groups A & B are co dominant,
and equally express in a person having blood group AB.
F1 generation
Phenotype: Pink
Genotype:
F2 generation
Phenotype: Red : Pink : White
Ratio- 1
: 2
:
1
25%
50%
25%
Alternative form of a gene
A and C
D
Possible blood groups of children
A, B, AB, or O