Question 1 1 / 1 pts It is difficult to classify humans into races because:    there are too many different races     variation in one trait is usually discrete rather than clinally distributed     classifications based on different characters classify the same people into different groups     anthropologists have only recently begun to tackle the problem of human variation     Question 2 1 / 1 pts Most mutations are:    adaptive (they have a positive affect on the fitness of an organism)     powerful (they have a powerful affect on the fitness of an organism)    deleterious (they have a negative affect on the fitness of an organism)     neutral (they have no affect on the fitness of an organism)     Question 3 1 / 1 pts Genetic drift is:    change in allele frequency due to genetics    change in allele frequency due to selection    change in allele frequency due to convergence    change in allele frequency due to chance     Question 4 1 / 1 pts Most genetic variation exists   between groups    none of these    within groups    between races     Question 5 1 / 1 pts Most observed human variation changes gradually, rather than having discrete boundaries as expected - this gradual change is referred to a___________

Question 1

1 / 1 pts

It is difficult to classify humans into races because:

there are too many different races

variation in one trait is usually discrete rather than clinally distributed

 Correct!  

classifications based on different characters classify the same people into different groups

anthropologists have only recently begun to tackle the problem of human variation

Question 2

1 / 1 pts

Most mutations are:

adaptive (they have a positive affect on the fitness of an organism)

powerful (they have a powerful affect on the fitness of an organism)

deleterious (they have a negative affect on the fitness of an organism)

 Correct!  

neutral (they have no affect on the fitness of an organism)

Question 3

1 / 1 pts

Genetic drift is:

change in allele frequency due to genetics

change in allele frequency due to selection

change in allele frequency due to convergence

 Correct!  

change in allele frequency due to chance

Question 4

1 / 1 pts

Most genetic variation exists

between groups

none of these

 Correct!  

within groups

between races

Question 5

1 / 1 pts

Most observed human variation changes gradually, rather than having discrete boundaries as expected - this gradual change is referred to a___________.

cine

slow change

 Correct!  

clinal

gradient

Question 6

0 / 1 pts

Traits are more likely to exhibit continuous variation when:

You Answered  

inheritance is blending rather than particulate

they are affected by alleles at only one locus

 Correct answer  

they are determined by alleles at multiple loci

there are no environmental influences

Question 7

1 / 1 pts

Which of the following does not increase allelic variation?

recombination

 Correct!  

natural selection

none of these

mutation

Question 8

0 / 1 pts

Recombination is important in evolution because it results in:

an increase in the amount of mutations that could possibly be passed onto the offspring

 Correct answer  

an increase in the amount of variation that can be passed on to an offspring

 You Answered  

the swapping of chromosome segments between two maternal chromosomes

the swapping of chromosome segments between two paternal chromosomes

Question 9

0 / 1 pts

These are all used to measure human genetic variation

You Answered  

blood type, DNA, STRs

SNPS, RSS, mtDNA

 Correct answer  

STRs, SNPS, mtDNA

mtDNA, RSS, blood type

Question 10

1 / 1 pts

Which of these is not a problem with racial classification?

there are no sharp boundaries of human variation

most variation is found within groups

 Correct!  

African populations have more diversity than any other population

every racial classification was different from the next