Question 1

Which of the following best describes the difference between mitosis and meiosis?

Accepted Answer

Mitosis produces two genetically identical diploid cells, while meiosis produces four genetically unique haploid cells.

Question 2

During which phase of the cell cycle does DNA replication occur?

Accepted Answer

S phase

Question 3

A human somatic cell contains 46 chromosomes. After meiosis, how many chromosomes will each gamete contain?

Accepted Answer

23

Question 4

Which process during meiosis increases genetic variation by exchanging genetic material between homologous chromosomes?

Accepted Answer

Crossing over

Question 5

What is the probability of obtaining a homozygous recessive offspring from a cross between two heterozygous parents (Aa x Aa)? Use the rule of multiplication.

Accepted Answer

$$P = 0.25$$

Question 6

Which syndrome is caused by nondisjunction resulting in an XXY karyotype?

Accepted Answer

Klinefelter syndrome

Question 7

Which of the following is NOT a function of cell division?

Accepted Answer

Protein synthesis

Question 8

In Mendel’s experiments, what is the expected phenotypic ratio in the F2 generation from a monohybrid cross?

Accepted Answer

$$3:1$$

Question 9

Which base pairing occurs in DNA?

Accepted Answer

A pairs with T, G pairs with C

Question 10

What is the role of the enzyme DNA polymerase during DNA replication?

Accepted Answer

Synthesizes new DNA strands by adding nucleotides

Question 11

Which genetic disorder is caused by a single gene and results in abnormal hemoglobin and damage to organs?

Accepted Answer

Sickle-cell disease

Question 12

What is the correct sequence of events in the flow of genetic information in a eukaryotic cell?

Accepted Answer

Replication → Transcription → Translation

Question 13

Which of the following best explains the concept of 'gene regulation' in bacteria?

Accepted Answer

Genes are grouped and regulated together to conserve resources, expressing only those needed for current conditions.

Question 14

Which process is responsible for the exchange of genetic material between homologous chromosomes during meiosis?

Accepted Answer

Crossing over

Question 15

What is the Hardy-Weinberg equation used for in population genetics?

Accepted Answer

To determine allele frequencies in a non-evolving population

Question 16

Which of the following is an example of artificial selection?

Accepted Answer

Humans breeding dogs for desirable traits

Question 17

Which of the following mechanisms can lead to speciation within the same geographic area?

Accepted Answer

Sympatric speciation

Question 18

Which of the following is a correct statement about the structure of DNA?

Accepted Answer

DNA is a double helix with sugar-phosphate backbones on the outside and base pairs on the inside.

Question 19

Which of the following is a real-world application of the CRISPR-Cas9 system?

Accepted Answer

Editing specific genes in living cells to correct genetic disorders

Question 20

Which evolutionary mechanism is most likely responsible for the rapid spread of antibiotic resistance in bacteria?

Accepted Answer

Natural selection

Study Guide (Ch. 8-14)

Study Guide - Practice Questions

Study Guide - Flashcards