Selective breeding

Question 1

What is selective breeding

Answer 1

Artificially selecting plants/animal that have desirable characteristics to remain in a population

Question 2

explain the common process of selective breeding in animals

Answer 2

select animals in stock with desirable characteristics breed them together and select offspring that show desired characteristic and breed them over many generations

Question 3

what are plants bred for by humans

Answer 3

disease resistance , increased crop yield tolerance to weather bigger fruits

Question 4

explains the problem of selective breeding in regards to gene pool

Answer 4

inbreeding causes reduction in gene pool due to closely related plants/animals being bred together which reduces number of alleles in a population.

Question 4

explains the problem of selective breeding in regards to gene pool

Answer 4

inbreeding causes reduction in gene pool due to closely related plants/animals being bred together which reduces number of alleles in a population.

Question 5

what does limiting size of gene pool mean

Answer 5

• organism inherit harmful genetic defects

- vulnerable to new diseases as not much variation so less chance in resistant alleles

Question 6

explain the difference of selective breeding and natural selection

Answer 6

• natural selection is a natural process whilst selective breeding is due to humans
• natural selection results in development of populations w features better adapted to environment whilst selective breeding results in population w features useful to humans
• natural selection takes long time while selective breeding is quicker as desired features reproduce