Question 1

Which of the following best describes a karyotype and its most common medical use?

Accepted Answer

A karyotype is an image of a complete set of chromosomes, often used to detect chromosomal abnormalities in cells, such as those from a tumor.

Question 2

After mitosis, how does the chromosome number in daughter cells compare to the parental cell?

Accepted Answer

Daughter cells have the same number of chromosomes as the parent cell.

Question 3

Which of the following statements about meiosis is correct?

Accepted Answer

Meiosis produces haploid gametes, each with half the chromosome number of the parent cell.

Question 4

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

Accepted Answer

Crossing over during prophase I

Question 5

A moss spends most of its life cycle in which cellular state?

Accepted Answer

Haploid

Question 6

Which of the following best explains why offspring from sexual reproduction are genetically unique?

Accepted Answer

Because crossing over, independent assortment, and random mating all contribute to genetic variation.

Question 7

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

Accepted Answer

$$23$$

Question 8

Which of the following definitions is correct?

Accepted Answer

A gene is a part of DNA that codes for proteins.

Question 9

Which event during meiosis leads to the random distribution of maternal and paternal chromosomes into gametes?

Accepted Answer

Independent assortment during metaphase I

Question 10

A scientist observes a cell with homologous chromosomes paired together and exchanging segments. Which stage of meiosis is being observed?

Accepted Answer

Prophase I

Question 11

Which of the following is NOT a source of genetic variation in sexually reproducing organisms?

Accepted Answer

Replication of DNA during S phase

Question 12

Which statement best distinguishes asexual from sexual reproduction?

Accepted Answer

Asexual reproduction produces offspring genetically identical to the parent.

Question 13

A cell with $$n = 8$$ chromosomes undergoes mitosis. How many chromosomes will each daughter cell have after division?

Accepted Answer

$$8$$

Question 14

Which of the following best describes homologous chromosomes?

Accepted Answer

They are pairs of chromosomes, one from each parent, that contain the same genes.

Question 15

Which process is responsible for producing somatic cells necessary for growth and repair?

Accepted Answer

Mitosis

Question 16

Which of the following scenarios would most likely result in a genetic disorder detectable by karyotype analysis?

Accepted Answer

A missing or extra chromosome in a cell

Question 17

Which of the following is true regarding the number of cell divisions in mitosis and meiosis?

Accepted Answer

Mitosis involves one division; meiosis involves two.

Question 18

A geneticist is studying a gene located at a specific position on a chromosome. What is this position called?

Accepted Answer

Locus

Question 19

Which of the following best explains why cancer cells are often analyzed using karyotypes?

Accepted Answer

To visualize chromosomal abnormalities, such as extra or missing chromosomes, that may contribute to cancer.

Question 20

Which of the following events does NOT occur during meiosis but does occur during mitosis?

Accepted Answer

Production of genetically identical daughter cells

Meiosis and Sexual Life Cycles: Study Guide

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