speciation

Question 1

define speciation

Answer 1

Process of producing two species

Question 2

how does speciation occur?

Answer 2

isolation, variation, and selection

Question 3

define species

Answer 3

group of individuals that share many characteristics and are able to interbreed under natural conditions to produce offspring

Question 4

what are the 4 steps of speciation?

Answer 4

variation
isolation
selection
speciation

Question 5

what is the first step of speciation?

Answer 5

variation

• variation between individuals of a species
• multiple alleles are available

Question 6

what is the second step of speciation?

Answer 6

isolation

• populations of the same species are isolated
• barrier to gene flow = geographical, cultural, religion, language
• gene pool is separated

Question 7

what is the third step of speciation?

Answer 7

selection

• each population is subjected to different selective agents = natural selection, mutation, genetic drift
• all mechanisms which lead to a change in allele frequency
• favourable alleles are represented in a high proportion

Question 8

what is the fourth step of speciation?

Answer 8

speciation

- allele frequency changes until they become so different that the two groups are no longer to be able to interbreed