Phenotypic Variance

Question 1

What causes variation among individuals in a population?

Answer 1

genetic differences between individuals
environmental differences
interaction between genotype and phenotype

Question 2

How can phenotypic variance be expressed:

Answer 2

Vp= VG+VE+VGxE

Question 3

may include environmental factors where variations are not caused by genetic differences

Answer 3

Environmental Variance

Question 4

those in which the relative performance of different genotypes vary with the environments in which the genotypes are placed

Answer 4

Genotypic-Environmental Variance

Question 5

variations due to genotype;

Answer 5

Genotypic Variance

Question 6

Genotypic Variance arises from what effects:

Answer 6

additive
dominance
epistasis or interaction

Question 7

True or False: The partitioning of variance into genetic and environmental components allows us to estimate their relative importance in influencing the phenotypic variance within a group.

Answer 7

True

Question 8

True or False: If VG is very high and VE is very low, genetics play the greater role in promoting phenotypic variation within a group

Answer 8

True

Question 9

True or False: If VG is very high and VE is very low, environment plays the greater role in promoting phenotypic variation within a group

Answer 9

False

Genetics plays the greater low, if Genetic Variation is high

Question 10

True or False: If VG is low and VE is high, environmental factors underlie much of the phenotypic variation

Answer 10

True

Question 11

produced through inbreeding

Answer 11

monomorphic strains

Question 12

True or False: VG and VE can be determined experimentally by comparing the variation in traits between genetically identical and genetically disparate group

Answer 12

True

Question 13

carry the same allele for all the genes

Answer 13

monomorphic strains

Question 14

genotypically identical; VG=0

Answer 14

phenotypic variation are all due to environment