6.2.14(Artificial selection)

Name 5 characteristics that are desirable traits in plants

• Higher yield

• Better taste

• Richer colour

• Drought resistance

• Tolerance to hot/cold weather conditions

Name 2 characteristics that are desirable in animals

• Higher yield - meat, milk and leather

• Better taste

Describe the effects of artificial selection on genetic diveristy

• Only organisms with similar traits are bred together

• These will all have similar allele

• It results in a bottleneck as it reduces the number of alleles in the gene pool

Describe the long term effects of artificial selection

• Useful alleles lost from population

• Less chance of resistance to disease

• Ethical concerns

• Reduced gene pool

Explain why it is important to preserve ancestor species

• Maintain biodiveristy

• Ethical reasons

• Part of a food chain

• Maintain gene pool