Question 1

Which of the following best describes Mendelian inheritance?

Accepted Answer

Traits are passed from parents to offspring through discrete units called genes, following predictable ratios.

Question 2

A couple, both heterozygous for a recessive genetic disorder ($$Aa$$), are planning to have a child. What is the probability that their child will inherit the disorder?

Accepted Answer

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

Question 3

Which process is primarily responsible for the separation of homologous chromosomes during meiosis?

Accepted Answer

Meiosis I

Question 4

A pedigree shows a trait that appears in every generation and affects both males and females equally. What is the most likely mode of inheritance?

Accepted Answer

Autosomal dominant

Question 5

If a gene exhibits incomplete dominance, what phenotype ratio would you expect in the $$F_2$$ generation from a cross between two heterozygotes?

Accepted Answer

1:2:1

Question 6

Which equation correctly represents the Hardy-Weinberg equilibrium for a gene with two alleles, $$A$$ and $$a$$, with frequencies $$p$$ and $$q$$?

Accepted Answer

$$p^2 + 2pq$$ + $$q^2 = 1$

Question 7

A geneticist uses PCR to amplify a segment of DNA. Which enzyme is essential for this process?

Accepted Answer

DNA polymerase

Question 8

Which of the following best explains the concept of gene linkage?

Accepted Answer

Genes located close together on the same chromosome tend to be inherited together.

Question 9

A woman is a carrier for an X-linked recessive disorder. Her partner does not have the disorder. What is the probability that their son will have the disorder?

Accepted Answer

$$\frac{1}{2}$$

Question 10

Which of the following mutations is most likely to result in a frameshift?

Accepted Answer

An insertion of one base

Question 11

In a population, the frequency of allele $$A is$$ $$0.7$$ and allele $$a is$$ $$0.3. $$What is the expected frequency of heterozygotes under Hardy-Weinberg equilibrium?

Accepted Answer

$$0.42$$

Question 12

Which process converts the genetic code in mRNA into a sequence of amino acids?

Accepted Answer

Translation

Question 13

A patient is found to have a chromosomal mutation resulting in the loss of a segment of chromosome 5. What type of mutation is this?

Accepted Answer

Deletion

Question 14

Which of the following best describes quantitative genetics?

Accepted Answer

The study of traits that show continuous variation and are influenced by multiple genes.

Question 15

Which molecular technique is used to separate DNA fragments by size?

Accepted Answer

Gel electrophoresis

Question 16

A population of 1000 individuals has 360 individuals with genotype $$AA$$, 480 with $$Aa$$, and 160 with $$aa. $$What is the frequency of allele $$A$$?

Accepted Answer

$$0.6$$

Question 17

Which of the following is a real-world application of DNA sequencing technology?

Accepted Answer

Diagnosing genetic diseases

Question 18

Which of the following best explains the function of a promoter in gene regulation?

Accepted Answer

It binds regulatory proteins to initiate transcription.

Question 19

A genetic counselor is analyzing a family with a history of cystic fibrosis, an autosomal recessive disorder. If both parents are carriers, what is the probability that their next child will be a carrier?

Accepted Answer

$$\frac{1}{2}$$

Question 20

Which of the following scenarios best illustrates gene-environment interaction?

Accepted Answer

A person with a genetic predisposition to high cholesterol develops heart disease only after consuming a high-fat diet.

Genetics Course Syllabus and Topic Overview – Fall 2025

Study Guide - Practice Questions

Study Guide - Flashcards