Unit 1 Speciation Flashcards
(7 cards)
1
Q
What are the four main evolutionary forces?
A
Natural selection, genetic drift, gene flow, and mutation.
2
Q
How does natural selection affect allele frequencies?
A
It increases the frequency of alleles that contribute to increased fitness.
3
Q
What is genetic drift?
A
Random changes in allele frequencies, especially in small populations.
4
Q
What is gene flow
A
The movement of alleles between populations, increasing genetic similarity.
5
Q
What is mutation?
A
A change in DNA that introduces new alleles into a population.
6
Q
What is the Hardy-Weinberg principle?
A
It states that allele and genotype frequencies in a population remain constant unless acted upon by evolutionary forces.
7
Q
A
