Inheritence Patterns

Homozygous Dominant

2 dominant alleles

Heterozygous

2 alleles (usually one dominant, 1 recessive)

Genotype

Description of the alleles (Rr)

Phenotype

Physical trait a genotype produces

Co-dominance

Heterozygous phenotype where 2 alleles are dominant together a traits show both alleles

Incomplete dominance

Heterozygous phenotype where 2 alleles mix together

Sex linked-alleles

Alleles on sex chromosomes

Female sex linked-alleles

similar to regular but with an x

Male sex-linked alleles

only have one x so it just has the trait on the x

Dominant lethal alleles

If an organism has one of these alleles it will kill them

Recessive lethal alleles

If an organism has 2 it’s lethal, only one will be dominated

Dihybrid

2 pairs of alleles