Extended answer - Isolation and Mutation / Selection Flashcards

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1
Q

Isolation and mutation 1, 2 and 3

A
  1. Isolation barriers prevent gene flow between populations and preven them interbreeding.
  2. Geographical isolation leads to allopatric speciation.
  3. Behavioural isolation leads to sympatric speciation.
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2
Q

Isolation and mutation 4, 5 and 6

A
  1. Ecological isolation leads to Sympatric speciation.
  2. Different mutations occur on each side of the isolation barrier.
  3. Some mutations may provide a selective advantage.
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3
Q

Selection 1 and 2

A
  1. Natural selection is non random increase in frequency of genetic sequences that increase survival.
  2. There are different selection pressures each side of a barrier.
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4
Q

Selection 3 and 4

A
  1. and 4. Name and description of each type of selection- disruptive, stabilising and directional.
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5
Q

Selection 5, 6 and 7

A

5 and 6. After many generations an new species form

7. If populations can no longer interbreed to produce fertile offspring the different species has been produced.

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