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What's the Difference?

Homozygous Dominant

  • When an organism carries two copies of the same dominant allele, it is Homozygous Dominant.

  • This is shown in the picture below with two capital P's being Homozygous Dominant.

Heterozygous

  • When an organism carries two different alleles, the organism is Heterozygous. 

  • This is shown in the picture below with Bb and bB being Heterozygous.

Homozygous Recessive

  • When an organism carries two copies of the same recessive allele, it is Homozygous Recessive.

  • This is shown in the picture below with two lowercase p's being Homozygous Recessive.

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