• Mendel’s experiments only looked at traits in which only one of the alleles is expressed

COMPLETE DOMINANCE

F1 x F1

Second Generation

(F2)

Homozygous dominant = purple

Homozygous recessive = white

Heterozygous = lavender

• Mendel’s experiments only looked at traits in which only one of the alleles is expressed

COMPLETE DOMINANCE

Incomplete dominance: a situation where neither allele dominates the other and both exercise an influence on the individual; results in partial expression of both traits.

F1 x F1

Second Generation

(F2)

Homozygous dominant = purple

Homozygous recessive = white

Heterozygous = purple and white speckled

• Mendel’s experiments only looked at traits in which only one of the alleles is expressed

COMPLETE DOMINANCE

Incomplete dominance: a situation where neither allele dominates the other and both exercise an influence on the individual; results in partial expression of both traits.

Codominance: A situation where both alleles are expressed fully to produce offspring with a third phenotype

White (recessive) Red (dominant)Roan