Chapter 02 pt 2

Question 1

heritability (H2)

Answer 1

proportion of phenotypic variance due to genetic variance in a population

Question 2

variance

Answer 2

statistical measure of variability/ caused by genes and enviornment

Question 3

phenotypic variance

Answer 3

variance in behavioral traits

Question 4

genetic variance

Answer 4

due to genes

Question 5

enviornmental variance

Answer 5

due to enviornment

Question 6

dominance interactions

Answer 6

alleles of the same gene can interact with on another

Question 7

epistasis

Answer 7

interactions between different genes

Question 8

adaptive genetic effects

Answer 8

average effect of alleles on phenotype

Question 9

regression

Answer 9

measuring the phenotypic trait of parents vs offspring
slope= heritable
flat = no heritability

Question 10

qualitative

Answer 10

discrete characteristitics

Question 11

quantitative

Answer 11

most phylogentic traits are controlled by genes

Question 12

what does phenotypic variance =

Answer 12

VP

Question 13

what is broad sense heritability?

Answer 13

rough measure of heritability

Question 14

h2 = 0

Answer 14

no heritability

Question 15

h2= 1

Answer 15

complete resemblance

Question 16

h2= 0.5

Answer 16

equal influence of genes and enviornment

Question 17

Vg =

Answer 17

genetic variance

Question 18

Vd=

Answer 18

proportion of pehnotypic variance related to dominance interations

Question 19

Vi =

Answer 19

proportion of VP related to epistasis

Question 20

Va=

Answer 20

proportion of VP related to additive genetic effects

Question 21

total genetic variance equation

Answer 21

VG= VD + VI +VA

Question 22

what are additive genetic effects?

Answer 22

effect of individual ealles on phenotype

Question 23

what are 2 common ways to measure narrow sense heritability?

Answer 23

1. truncation selection experiment
2. parent offspring regression