Dominance ​
(In a heterozygous pairing of alleles)
Dominance: greater influence of an allele over the other
Recessiveness: lesser influence of an allele over the other
Completeness ​
Complete dominance: complete inhibition of the expression of recessive alleles
Partial / incomplete dominance: partial inhibition of the expression of recessive alleles resulting in blended expression of all alleles
Codominance ​
Existence of multiple dominant alleles resulting in clearly independent expression of each allele
[!example] A rooster with white and black alleles exhibiting both colours
[!example] Codominance of
and alleles makes blood type AB.
Type of chromosome ​
Autosomal dominance: dominance of an allele on an autosome
Sex / X / Y-linked dominance: dominance of an allele on a sex chromosome
Sex-linked recessive disorders affect more males than females
Ajitani Hifumi