Dominance and traits Flashcards
1
Q
What is codominance?
A
Both alleles are expressed in heterozygous Blood AB
2
Q
What is incomplete codominance?
A
Dominant allele doesn’t completely mask the recessive allele
e.g. sickle cell anaemia
3
Q
What is polygenic?
A
Traits controlled by more than one gene
height, eye colour
4
Q
What is pleiotropy?
A
One gene that contributes to several traits or has a multiple effect
5
Q
What is sex lined traits and how s the carrier?
A
coded by genes on sex chromosomes
always female who is the carrier
6
Q
What is a mutant allele?
A
codes for an abnormal phenotype
