If both alleles inherited from 2 parents are the same,
the individual is homozygous.
If the 2 alleles differ, the individual is heterozygous.
- In a heterozygote, often the dominant allele
determines its phenotype; the other allele is called recessive.
In this example, the dominant allele expresses purple
flowers, while the recessive allele expresses white
flowers.
Possible genotypes are:
- A homozygous dominant individual shows purple
flowers.
- A homozygous recessive individual shows white
flowers.
- A heterozygous individual shows the dominant phenotype:
purple
flowers.
