artificial selection-7

Question 1

3 factors for domestication?

Answer 1

• interdependency
• mutualistic
• co-evolutionary

Question 2

do other animals domesticate?

Answer 2

yes, ants manage aphids and take their sap

Question 3

steps that lead to domestication?

Answer 3

• free breeding
• confinement
• confinement with breeding in captivity
• selective breeding

Question 4

how does domestication affect the animals genome?

Answer 4

imprints the genome

Question 5

when was the domestication revolution? what were the factors influencing? and what were the consequences?

Answer 5

• 12,000 to 14 YA
• climate warming as a factor
• consequences were sedentarisation and increase in human population

Question 6

example of domestication effecting human evolution?

Answer 6

the evolution of the lactase gene

Question 7

what dna can be analysed for study of domestication?

Answer 7

Mt

Question 8

problems with archaeology and genetic study?

Answer 8

• archaeology sampling issues

- dna is degraded

Question 9

debate about the domestication of the chicken?

Answer 9

• red jungle fowl was thought to be the only ancestor
• but theres been more sampling and theres more genetic diversity thats been found… possibly 4 ancestors?
• however, the genetic diversity may be due to backcrossing between the domesticate and the wild

Question 10

why is it now believed that the ancestor of domesticated camel is extinct?

Answer 10

because can’t find mt dna in any current wild populations

Question 11

origin of domesticated camelid?

implications for fiber production?

Answer 11

introgression of llama into alpaca

coarser fur due to llama

Question 12

changes on animals that have been domesticated?

Answer 12

• morphological - smaller
• sex ratio
• behavioural