Evolution may lead to speciation

Question 1

Individuals within a population of species may show a wide range of what?
and what is this due to?

Answer 1

variation in phenotype

- due to genetic and environmental factors

Question 2

What is the primary source of genetic variation

Answer 2

mutation

Question 3

What produces further genetic variation

Answer 3

• meiosis

- random fertilisation of gametes during sexual reproduction

Question 4

what results in differential survival and reproduction? ie natural selection

Answer 4

predation, disease and competition for the means of survival

Question 5

What are organisms with phenotype’s providing a selective advantage more likely to do/

Answer 5

produce more offspring and pass on their favourable alleles to the next generation

Question 6

What can reproductive separation of two populations result in>

Answer 6

The accumulation of differences in their gene pools

Question 7

When do new species arise

Answer 7

when the genetic difference lead to an inability of members of populations to interbreed and produce fertile offspring
- meaning new species arise from existing species