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Multiple Choice Quiz

1
The unit of evolution is the:
A)family
B)reproductive population
C)individual
D)breeding pair
2
The genotype of a population is known as the:
A)gene equilibrium
B)genetic load
C)gene pool
D)allele sum
3
If a population is in genetic equilibrium:
A)the allele frequencies remain constant
B)the allele frequencies are changing in a specific direction
C)there are more dominant than recessive alleles
D)there are more recessive than dominant alleles
4
A condition which must be assumed for the state of genetic equilibrium is.
A)a small and isolated population
B)random mating
C)consanguineous mating
D)all of the above
5
The Hardy-Weinberg formula is, in part p2+________+q2:
A)p2q2
B)pq2
C)pq
D)2pq
6
In the Hardy-Weinberg formula, q2 refers to the frequency of:
A)AA
B)Aa
C)aa
7
The term genetic load refers to:
A)the sum of all the alleles in the population
B)the sum of all the alleles in an individual
C)the totality of recessive alleles in an individual's genotype
D)the totality of recessive lethal alleles in the population
8
The ultimate source of all biological variation is:
A)mutation
B)natural selection
C)genetic drift
D)nonrandom mating
9
The small population of the island of Martha's Vineyard, in the 1800s, included many people who were congenitally deaf. Everyone there spoke sign language because so many people had deaf neighbors or relatives. They could trace this trait back to a few of the original settlers on the island, who were deaf and in the same family. What is the most likely explanation why so many people on the island were deaf, in evolutionary terms?
A)There was genetic drift.
B)There was a mutation causing the gene for deafness.
C)Gene flow onto the island continually brought in genes for deafness from the mainland.
D)The foghorns on the island provided a selective advantage to being deaf.
10
Assortative mating occurs when:
A)the mating does not result in viable offspring
B)the mating is between individuals from different species
C)mating occurs completely at random
D)people with certain phenotypes mate at nonrandom frequencies





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