Question 1

Which phase of the cell cycle is characterized by active gene expression and cell growth before DNA replication?

Accepted Answer

G1 phase

Question 2

During which stage of mitosis do chromosomes align at the metaphase plate, each attached to spindle fibers from opposite poles?

Accepted Answer

Metaphase

Question 3

A cell with 2n = 10 undergoes meiosis. At the end of meiosis I, what is the chromosome number and ploidy of each daughter cell?

Accepted Answer

$n = 5$, haploid

Question 4

Which statement best describes Mendel's Law of Independent Assortment?

Accepted Answer

Alleles for different genes segregate independently during gamete formation

Question 5

In a dihybrid cross (F1 yellow, round X yellow, round), what proportion of the F2 offspring are wrinkled and yellow?

Accepted Answer

$3/16$

Question 6

Which cellular event during meiosis explains Mendel's Law of Independent Assortment?

Accepted Answer

Random alignment of homologous chromosomes during Metaphase I

Question 7

A white-bellied pumpkin has $2n = 114$. How many chromosomes will each gamete contain after meiosis?

Accepted Answer

$57$

Question 8

Which of the following is NOT true about homologous chromosomes?

Accepted Answer

They are identical copies of each other

Question 9

Which scientist's work laid the foundation for the field of transmission genetics?

Accepted Answer

Gregor Mendel

Question 10

What is the probability of getting three heads in a row when you flip a fair coin three times?

Accepted Answer

$1/8$

Question 11

Which of the following statements about sister chromatids is TRUE?

Accepted Answer

They are identical copies formed after DNA replication

Question 12

During which phase of mitosis does the nuclear envelope break down and spindle fibers attach to chromosomes?

Accepted Answer

Prometaphase

Question 13

Which of the following is a real-world application of Mendel's Law of Segregation?

Accepted Answer

Predicting the probability of inheriting a genetic disorder

Question 14

Which term describes the observable characteristics of an organism resulting from its genotype?

Accepted Answer

Phenotype

Question 15

Which process restores the diploid number of chromosomes in sexually reproducing organisms?

Accepted Answer

Fertilization

Question 16

What is the main function of the centromere during cell division?

Accepted Answer

It is the region where spindle fibers attach to chromosomes

Question 17

Which of the following is a consequence of crossing over during meiosis?

Accepted Answer

Increased genetic variation among gametes

Question 18

Which of the following best describes a dyad?

Accepted Answer

A duplicated chromosome made of two identical sister chromatids joined at the centromere

Question 19

Which phase of meiosis is responsible for the separation of homologous chromosomes?

Accepted Answer

Meiosis I

Question 20

Which of the following is NOT a feature that distinguishes meiosis from mitosis?

Accepted Answer

Production of genetically identical cells

Genetics Study Guide: Cell Cycle, Mitosis, Meiosis, and Mendelian Genetics

Study Guide - Practice Questions