Ch. 24 Quantitative Genetics

Question 1

What is another name for quantitative?

Answer 1

continuous

Question 2

What is another word for qualitative?

Answer 2

discontinuous

Question 3

What does qualitative mean?

Answer 3

only a few distinct phenotypes

Question 4

What does quantitative mean?

Answer 4

varies continuously for many phenotypes

Question 5

True or False: the environment has no effect on phenotype

Answer 5

False

Question 6

True or False: in quantitative, each genotype may produce a range of possible phenotypes

Answer 6

True

Question 7

Which two below are examples of quantitative?

Answer 7

threshold
meristic

Question 8

These characteristics have a limited number of distinct phenotypes and can only be whole numbers

Answer 8

meristic

Question 9

You have it or you don’t but with each category there is a continuous range

Answer 9

threshold

Question 10

Quantitative characteristics controlled by cumulative effects of many genes

Answer 10

polygenic inheritance

Question 11

What is the ratio for two complete heterozygotes in polygenic inheritance?

Answer 11

1:4:6:4:1

Question 12

All variances add to be this

Answer 12

phenotypic variance

Question 13

If all phenotypic variance is due to this, offspring would be exact intermediate of the parents

Answer 13

additive variance

Question 14

What are the three components of genetic variance?

Answer 14

additive
dominance
genetic-environmental

Question 15

What are the three main components of phenotypic variance?

Answer 15

genetic variance
environmental variance
genetic-environmental variance

Question 16

proportion of phenotypic variance that is due to genetic variance

Answer 16

broad sense heritability

Question 17

True or False: narrow sense heritability is VA?AP

Answer 17

True

Question 18

True or False: heritability can be used on an individual basis

Answer 18

False

Question 19

in R = h^2 (S), what is R

Answer 19

response to selection

Question 20

in R = h^2 (S), what is S

Answer 20

selection differential

Question 21

If I have a group where the average is 10, and I select a small subgroup of 12, what is true

Answer 21

S=2

Question 22

The group of 8, I select a group where the average is 12, their offspring have an average of 15, what is true

Answer 22

R=7

Question 23

If the population average is 5, and S is 9, what is the average for the selected group?

Answer 23

14

Question 24

If the population has average 1, selected group has average 6, and R=8, what is the average in the offspring?

Answer 24

9