variation and selection Flashcards
1
Q
what causes variation
A
crossing over during meiosis
random assortment in meiosis
random fusion of gametes
mutation
2
Q
what is mutation
A
spontaneous genetic change which causes new alleles to be formed. it happens randomly
3
Q
what causes mutation
A
pass on from ovary/testes (hereditary)
random
long term exposer to mutagens
4
Q
what is mutagens
A
substances (chemicals and radiation) that increases rate of mutation
