Question 1

Which of the following best describes the main focus of population genetics?

Accepted Answer

The study of genetic composition and its changes over time within and between populations.

Question 2

In the context of Mendelian genetics, what is the probability that two heterozygous (Aa) parents will have a child with the homozygous recessive genotype (aa)?

Accepted Answer

$$\frac{1}{4}$$

Question 3

Which of the following is an example of a codominant genetic trait in humans?

Accepted Answer

ABO blood group, specifically the AB genotype

Question 4

A population geneticist is studying a locus with three alleles: A, B, and O. If the O allele is recessive and A and B are codominant, how many different genotypes and phenotypes are possible (ignoring subtypes)?

Accepted Answer

Six genotypes and four phenotypes

Question 5

Which evolutionary force is primarily responsible for introducing new genetic variation into a population?

Accepted Answer

Mutation

Question 6

If a human produces sex cells, how many possible combinations of chromosomes can be produced due to independent assortment alone? (Assume $$n = 23$$ pairs of chromosomes.)

Accepted Answer

$$2^{23}$$

Question 7

Which of the following best explains why siblings (other than identical twins) are not genetically identical, even though they share the same parents?

Accepted Answer

Recombination and independent assortment during meiosis create unique combinations of alleles in each gamete.

Question 8

A researcher is analyzing mitochondrial DNA (mtDNA) to trace ancestry. Which of the following statements is correct regarding mtDNA inheritance?

Accepted Answer

mtDNA is inherited exclusively from the mother.

Question 9

Which of the following is NOT considered one of the four main evolutionary forces in population genetics?

Accepted Answer

Assortative mating

Question 10

A population geneticist uses the AND rule of probability to calculate the likelihood of two independent genetic events occurring together. If the probability of event A is $$0.3$$ and event B is $$0.5$$, what is the probability of both events occurring?

Accepted Answer

$$0.15$$

Question 11

Which of the following best describes a haplotype?

Accepted Answer

A combination of alleles at different loci that are inherited together

Question 12

Which of the following is a real-world example of gene flow in human populations?

Accepted Answer

A person migrates to a new population and has children, introducing new alleles.

Question 13

Which of the following statements about dominant and recessive alleles is TRUE?

Accepted Answer

Dominance refers to the effect on phenotype, not allele frequency.

Question 14

A researcher is studying a quantitative trait such as human height. Which of the following statements is most accurate?

Accepted Answer

Quantitative traits are influenced by multiple genes and environmental factors.

Question 15

Which of the following best illustrates the concept of genetic drift?

Accepted Answer

A small population experiences random changes in allele frequencies from one generation to the next.

Question 16

Which of the following is a correct application of the OR rule in probability?

Accepted Answer

Calculating the probability of rolling a die and getting either a 2 or a 5.

Question 17

Which of the following best describes the difference between microevolution and macroevolution?

Accepted Answer

Microevolution refers to changes within a species over short time intervals, while macroevolution refers to changes at or above the species level over long timescales.

Question 18

Which of the following is a key advantage of using mitochondrial DNA (mtDNA) in studies of human ancestry?

Accepted Answer

mtDNA is inherited only through the maternal line, allowing for clear tracing of maternal ancestry.

Question 19

Which of the following best describes a polymorphism in population genetics?

Accepted Answer

A locus with two or more alleles, each with a frequency greater than 0.01.

Question 20

Which of the following is an example of how culture can influence genetic variation in human populations?

Accepted Answer

Cultural adaptations, such as agriculture, can change population size and affect the rate of mutation and genetic drift.

Genetic, Mathematical, and Anthropological Foundations of Population Genetics

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