Question 1

Which of the following best describes the relationship between genotype and phenotype?

Accepted Answer

Genotype is the genetic makeup of an organism, and phenotype is the observable expression of those genes.

Question 2

Which experimental technique is commonly used to separate DNA fragments based on size and charge?

Accepted Answer

Gel electrophoresis

Question 3

Which organelle contains its own circular chromosome and is inherited through the cytoplasm?

Accepted Answer

Mitochondrion

Question 4

Which of the following statements about the three domains of life is correct?

Accepted Answer

Eukarya have multiple chromosomes and a true nucleus.

Question 5

Which process is responsible for the transfer of DNA from a gel to a synthetic membrane for further analysis?

Accepted Answer

Southern blotting

Question 6

Which of the following is NOT a phase of modern genetics?

Accepted Answer

Discovery of the structure of proteins

Question 7

Which stain is commonly used to visualize nucleic acids in electrophoresis gels?

Accepted Answer

Ethidium bromide

Question 8

Which of the following best explains why sickle cell anemia can be studied using gel electrophoresis?

Accepted Answer

Sickle cell hemoglobin has a different charge and shape compared to normal hemoglobin, causing it to migrate differently in a gel.

Question 9

Which of the following is a direct result of artificial selection practiced by early humans?

Accepted Answer

The domestication of dogs from wild ancestors

Question 10

Which of the following is a correct statement about the central dogma of molecular biology?

Accepted Answer

DNA is transcribed into RNA, which is then translated into protein.

Question 11

Which of the following best describes a clade in a phylogenetic tree?

Accepted Answer

A group of organisms that share a common ancestor and all its descendants

Question 12

Which of the following processes does NOT directly lead to changes in allele frequencies in a population?

Accepted Answer

Mitosis

Question 13

Which of the following is a key insight from the Human Genome Project?

Accepted Answer

Only about 1.5% of the human genome contains exons.

Question 14

Which of the following best describes the focus of proteomics?

Accepted Answer

The study of the complete set of proteins encoded by a genome

Question 15

Which of the following equations correctly represents the central dogma of molecular biology?

Accepted Answer

$DNA \rightarrow RNA \rightarrow Protein$

Question 16

Which of the following is a correct statement about the use of ribosomal RNA (rRNA) in evolutionary studies?

Accepted Answer

Closely related species have more similar rRNA sequences.

Question 17

Which of the following is NOT a function of molecular probes in blotting techniques?

Accepted Answer

Amplifying DNA fragments

Question 18

Which of the following statements about Darwin’s principles of populations is correct?

Accepted Answer

Traits that increase survival and reproduction become more common in the next generation.

Question 19

Which of the following best describes the modern synthesis of evolution?

Accepted Answer

It merges evolutionary theory with experimental, mathematical, and molecular population biology.

Question 20

Which of the following is a real-world application of transcriptomics?

Accepted Answer

Studying which genes are actively transcribed in cancer cells compared to normal cells

The Molecular Basis of Heredity, Variation, and Evolution: Foundations of Genetics

Study Guide - Practice Questions