allelic series
having multiple alleles
codominance
Phenotype of the heterozygote includes the phenotypes of both homozygotes.
complete dominance
Phenotype of the heterozygote is the same as the phenotype of one of the homozygotes.
epistasis
interaction between genes in which the presence of a particular allele of one gene determines whether another gene will be expressed
epistatic
Epistatic gene determines whether or not a trait will be expressed
gene interaction
an interaction where the effects of a gene at one locus depends on the effects of a gene (or genes) at another locus.
genetic map
diagram showing the relative positions of genes along a particular chromosome.
incomplete dominance
Phenotype of the heterozygote is intermediate to (i.e., falls within the range) the phenotypes of the two homozygotes.
lethal allele
causes death at an early stage of development (often before birth).
linkage
tendency of particular alleles of different genes to be inherited together.
map unit
physical distance that produces 1% recombinant offspring.
multiple alleles
Refers to a gene locus that has more than two alleles present within a population.
polymorphism
The occurrence of more than two distinct phenotypes of a trait in a population.
sex-influenced characteristic
Characteristics that are determined by autosomal genes and are inherited according to Mendel's principles, but are expressed differently in males and females.