Allele Variation Flashcards
1
Q
define polymorphism
A
any allele found at an appreciable frequency in a population
2
Q
what factors (at a single locus) can affect the results of a genetic cross
A
- multiple genes at the sam locus (two versions of the same gene)
- type of dominance
3
Q
what are the types of dominance
A
complete
incomplete
codominance
4
Q
define incomplete dominance
A
phenotype of the heterozygote falls within the range between the phenotypes of the two homozygotes
5
Q
define complete dominance
A
phenotype of the heterozygote is the same as the phenotype of one of the homozygotes
6
Q
define codominance
A
phenotype of the heterozygote includes the phenotype of both homozygotes
7
Q
define expressivity
A
the degree to which a character is expressed
8
Q
what is a lethal allele
A
causes death at an early stage of development
