genetic - adaptations

Cards (6)

genetic diversity
total number of different alleles of each gene in a population
natural selection
species becoming more adapted to their environment
process of natural selection would lead to evolution occuring
describe the process of natural selection
new alleles caused by random gene mutations
if the new alleles increases the chances of survival, they are more likely to reproduce
advantageous allele passed onto whilst reproducing
new allele increase in frequency within the population
types of natural selections
directional,stabilising
directional selection
only occurs in environmental change
Extreme traits have a selective advantage
(eg antibiotic resistance)
favours an extreme phenotype
stabilising selection
no environmental change
modal trait has a selective advantage so it remains the same
favours an average phenotype

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