variation Flashcards
1
Q
variation
A
differences in the characteristics of individuals in a population
2
Q
what results in variation
A
- genetics, combination of two sets from parents
- conditions they have developed (environment)
- combination of genes and environment
3
Q
what characteristics are determined only by genes?
A
- eye colour
- blood group
- inherited disorders e.g cystic fibrosis
4
Q
what are most characteristics determined by?
A
a combination of genes and the environment
5
Q
what do all variants arise from?
A
mutations
6
Q
effect of mutations
A
- most have no effect on the phenotype
- some influence phenotype
- very few determine phenotype
7
Q
what is a mutation?
A
a change to the sequence of bases in DNA
