Question 1

Which of the following statements best explains why offspring produced by asexual reproduction are genetically identical to the parent?

Accepted Answer

Asexual reproduction involves mitosis, which produces cells with identical genetic information to the parent.

Question 2

During which phase of the cell cycle does chromosome duplication occur?

Accepted Answer

Interphase

Question 3

If a human cell undergoes mitosis, how many chromosomes will each daughter cell contain?

Accepted Answer

$$46$$

Question 4

Which process is responsible for producing gametes with half the number of chromosomes as body cells?

Accepted Answer

Meiosis

Question 5

A zygote is formed by the fusion of two gametes. If each gamete contains $$n$$ chromosomes, how many chromosomes will the zygote have?

Accepted Answer

$$2n$$

Question 6

Which of the following mechanisms does NOT contribute to genetic variation in sexually reproducing organisms?

Accepted Answer

Binary fission

Question 7

A person with Down syndrome has three copies of chromosome 21. What is the total chromosome count in their somatic cells?

Accepted Answer

$$47$$

Question 8

Which of the following best describes the law of independent assortment?

Accepted Answer

Alleles for different traits separate independently during meiosis.

Question 9

In a dihybrid cross between two heterozygous parents for two traits (YySs x YySs), what is the expected phenotypic ratio in the offspring?

Accepted Answer

$$9:3:3:1$$

Question 10

Which of the following is an example of incomplete dominance?

Accepted Answer

A cross between red and white flowers produces pink flowers.

Question 11

Which statement about X-linked recessive traits is TRUE?

Accepted Answer

Females can be carriers without expressing the trait.

Question 12

If a heterozygous black Labrador (Bb) is crossed with a chocolate Labrador (bb), what is the expected ratio of black to chocolate puppies?

Accepted Answer

$$1$$ black : $$1$$ chocolate

Question 13

Which of the following best describes polygenic inheritance?

Accepted Answer

Multiple genes influence a single trait, resulting in a continuous range of phenotypes.

Question 14

During which process do homologous chromosomes exchange segments of genetic material, increasing genetic diversity?

Accepted Answer

Crossing over during meiosis I

Question 15

Which of the following is a consequence of nondisjunction during meiosis?

Accepted Answer

Gametes with either an extra or missing chromosome

Question 16

Which genotype(s) result in type AB blood in humans?

Accepted Answer

$$IAIB$$

Question 17

Which of the following best explains why linked genes do not always obey Mendel's law of independent assortment?

Accepted Answer

Linked genes are located close together on the same chromosome and tend to be inherited together.

Question 18

A pedigree chart is useful for which of the following purposes?

Accepted Answer

Tracing the inheritance of genetic traits in human families.

Question 19

Which of the following is TRUE about the process of cytokinesis in plant cells?

Accepted Answer

A cell plate forms along the center line, eventually becoming a new cell wall.

Question 20

If a cell with $$2n = 46$$ chromosomes undergoes meiosis, how many chromosomes will each resulting gamete contain?

Accepted Answer

$$23$$

Cell Division, Chromosomes, and Inheritance: Study Notes for General Biology

Study Guide - Practice Questions