Evolutionary Change 4

Question 1

What is adaptive evolutionary change ?

Answer 1

Changes in a populations genetic makeup over generations they improve the organisms ability to survive and reproduce in their environment.
It is not random.

Question 2

Describe some everyday examples of adaptive evolutionary change

Answer 2

1. Insecticide resistance in head lice
2. Warfarin resistance in rats
3. Antibiotic resistance in bacteria

Question 3

What are selectively neutral genes ?

Answer 3

Genes that do not affect an organisms fitness, so they have no impact on survival of reproduction
They are not influenced by natural selection, they are random changes that occur.

Question 4

What are some examples of selectively neutral phenotypic traits ?

Answer 4

1. Markings on clover leaves
2. Markings on cone shells
   They seem to have no adaptive significance