QTL mapping

Question 1

trait types:

Answer 1

quantitative and qualitative

Question 2

quantitative trait loci mapping (QTL)

Answer 2

-quantitative trait loci=polygenetic
-behavior, grwoth, etc
-use DNA markers to find chromosomal regions assoceated with the trait
-try to find genes within identified regions
-positional candidate genes

Question 3

what are the two kinds of candidate genes

Answer 3

personal candidate genes
functional candidate genes

Question 4

personal candidate genes

Answer 4

-trait mapped to chromosome region
-gene under investigation resides in this area
-quantitative trait loci (QTL)

Question 5

functional candidate genes

Answer 5

-function associated with trait
-e.g. appetite pathway and feed intake

Question 6

DRD4 gene in animals

Answer 6

-mouse (emotional)
-horse (curiosity, vigilance)
-dog (aggression)

Question 7

candidate gene- leptin

Answer 7

-leptin affects fat deposition in mice
-called the “obese” gene
-involved in appetite regulation
-signal to stop eating

Question 8

milk production leptin

Answer 8

TT 1.5kg/day higher than CC

Question 9

why more milk form TT cows

Answer 9

TT enter lactation in better condition