Flashcards in artificial selection-7 Deck (12)
3 factors for domestication?
do other animals domesticate?
yes, ants manage aphids and take their sap
steps that lead to domestication?
-confinement with breeding in captivity
how does domestication affect the animals genome?
imprints the genome
when was the domestication revolution? what were the factors influencing? and what were the consequences?
-12,000 to 14 YA
-climate warming as a factor
-consequences were sedentarisation and increase in human population
example of domestication effecting human evolution?
the evolution of the lactase gene
what dna can be analysed for study of domestication?
problems with archaeology and genetic study?
-archaeology sampling issues
-dna is degraded
debate about the domestication of the chicken?
-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
why is it now believed that the ancestor of domesticated camel is extinct?
because can't find mt dna in any current wild populations
origin of domesticated camelid?
implications for fiber production?
introgression of llama into alpaca
coarser fur due to llama