Chapter 9 Powerpoint

Question 1

show continuous variation

Answer 1

Quantitative traits

Question 2

Large range of phenotypes

Answer 2

Quantitative traits

Question 3

Height, weight, and intelligence

Answer 3

Quantitative traits

Question 4

variation due to both genetic and environmental differences

Answer 4

Quantitative traits

Question 5

adding all of the values for a trait in the population and dividing by the number of individuals in the population

Answer 5

Mean

Question 6

a measure of how much variability there is in the population

Answer 6

Variance

Question 7

Traits influenced by many genes

Answer 7

Polygenic traits

Question 8

include quantitative traits, with continuous variation

Answer 8

Polygenic traits

Question 9

Interaction of multiple genes with multiple alleles

Answer 9

Polygenic traits

Question 10

human eye color is an example of

Answer 10

polygenic traits

Question 11

continuous variation may result form _______ effects

Answer 11

Environmental

Question 12

Most traits that show continuous variation are influenced by _____ and the ______.

Answer 12

Genes

Environment

Question 13

a heterozygote expresses an intermediate, “blended” phenotype

Answer 13

Incomplete dominance

Question 14

RR

Answer 14

Red Flowers

Question 15

rr

Answer 15

White flowers

Question 16

Rr

Answer 16

Pink flowers

Question 17

shows incomplete dominance

Answer 17

Sickle cell allele

Question 18

Mutates oxygen carrying hemoglobin molecules in red blood cells

Answer 18

Sickle cell disease

Question 19

Requires two copies of mutant allele

Answer 19

sickle cell disease

Question 20

Causes painful sickling attacks and organ damage

Answer 20

sickle cell disease

Question 21

Heterozygous carriers produce some mutant hemoglobin (sickle cell)

Answer 21

true

Question 22

In low ______, sickle cell disease symptoms may occur.

Answer 22

oxygen

Question 23

the heterozygote’s phenotype is a combination of two fully expressed traits

Answer 23

co-dominance

Question 24

_____ pairs of human chromosomes

Answer 24

23

Question 25

____ pairs of autosomes (non-sex chromosomes)

Answer 25

22

Question 26

____ pair of sex chromosomes

Answer 26

1

Question 27

who has 2 X chromosomes

Answer 27

Women

Question 28

who has 1 X and 1 Y chromosome

Answer 28

Men

Question 29

Sperm cells with an X or Y determine the ______ _____ of human offspring.

Answer 29

genetic sex

Question 30

____ gene on Y chromosome leads to testes development

Answer 30

SRY

Question 31

more common in either males or females

Answer 31

Sex-linked trait

Question 32

Some traits due to genes on the sex chromosomes

Answer 32

Sex-linked trait

Question 33

located on the X chromosome

Answer 33

X-linked

Question 34

______ only have one copy of X-linked genes.

Answer 34

Males

Question 35

More likely to be affected by recessive alleles on X chromosome

Answer 35

Males

Question 36

______ are less likely to express X-linkage

Answer 36

Females

Question 37

Must carry two defective X chromosomes

Answer 37

females

Question 38

_______traits-only males have Y chromosomes, so a y-linked mutated gene can only be passed from father to son

Answer 38

Y-linked

Question 39

Y-linked mutated gene can only be passed from father to son.

Answer 39

True