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Meiosis WB Quiz

Meiosis WB Quiz

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Question 1 of 20

1. Question
1 point(s)

Sexual reproduction increases genetic variation in a population. Which is a way that meiosis and fertilization lead to genetic variation?

Alleles are recombined when gametes from different parents join together during Prophase I.
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Mutations are usually repaired by cellular machinery before genes are expressed.
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DNA is replicated when a fertilized egg becomes a growing embryo through mitosis.
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Parents that are homozygous for the same trait will have offspring that are also homozygous for that trait.
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Question 2 of 20

2. Question
1 point(s)

According to this diagram, the result of spermatogenesis is four sperm cells, each with

strands of DNA that resulted from crossing over
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half of the original number of chromosomes
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genetically identical strands of DNA
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complete copies of all the original chromosomes
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Question 3 of 20

3. Question
1 point(s)

The following chart shows the number of 2n chromosomes in various organisms.

Which series lists the number of chromosomes in each gamete (sex cell) of a mosquito, corn, a human, and a dog?

3, 10, 23, 39
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3, 15, 22, 46
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6, 20, 23, 39
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6, 20, 46, 78
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Question 4 of 20

4. Question
1 point(s)

Select ALL of the following that are differences between Meiosis I and Meiosis II (3 answers).

In meiosis I, homologous chromosomes separate, while in meiosis II, sister chromatids separate.
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Genetic recombination (crossing over) only occurs in meiosis I.
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Genetic recombination (crossing over) only occurs in meiosis II.
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Meiosis II produces 4 haploid daughter cells, whereas meiosis I produces 2 diploid daughter cells.
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Meiosis II produces 2 haploid daughter cells, whereas meiosis I produces 4 diploid daughter cells.
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Question 5 of 20

5. Question
1 point(s)

Select ALL of the following that are characteristics of meiosis (2 answers).

Goes through one cell division
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Goes through two cell divisions
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Two diploid (2n) daughter cells that are genetically identical to the parent cell
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Produces cells for growth, repair, and replacement
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Produces gametes and assures genetic diversity in sexual reproduction
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Question 6 of 20

6. Question
1 point(s)

Meiotic cell division results in gametes that produce sperm and egg cells by

reducing the daughter chromosome number by 75%.
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reducing the daughter chromosome number by 50%.
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increasing the daughter chromosome number by 50%.
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increasing the daughter chromosome number by 75%.
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Question 7 of 20

7. Question
1 point(s)

Select ALL of the following that are characteristics for Meiosis (4 answers).

Goes through two cell divisions
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Occurs along with crossing over between non-sister chromatids in prophase I
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Produces cells for growth, repair, and replacement
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4 haploid (n) daughter cells, each containing half as many chromosomes as the parent cell. Daughter cells are genetically different from the parent cell and each other.
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Produces gametes and assures genetic diversity in sexual reproduction.
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Question 8 of 20

8. Question
1 point(s)

During meiosis, homologous chromosomes line up next to each other. In some cases, one arm of a chromatid crosses over the arm of another chromatid. What is the result of this process?

the creation of an additional sex cell
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continuity in the offspring cell's DNA
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the independent assortment of genetic material
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additional variation in the DNA of each sex cell formed leading to increased genetic diversity within a population
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Question 9 of 20

9. Question
1 point(s)

Genetic variation can increase the pace of evolution. Which would most likely increase genetic variation in a population?

cloning
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twinning
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crossing-over
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asexual reproduction
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Question 10 of 20

10. Question
1 point(s)

Crossing-over contributes to the recombination of genetic material in offspring. When does crossing-over happen during meiosis?

when the DNA of the diploid cell is copied
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when homologous chromosomes move to opposite ends of the dividing cell
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when spindle fibers move the chromosomes toward the midline of the dividing cell
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when homologous chromosomes pair in prophase I and portions of chromatids break off and are exchanged
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Question 11 of 20

11. Question
1 point(s)

Which statement explains why approximately half of an individual’s DNA sequence comes from each parent?

A cell from one parent undergoes meiosis, producing offspring cells that have both parents' DNA.
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A cell from one parent undergoes mitotic cell division, producing offspring cells that have only half of that parent's DNA.
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Cells in the parents undergo meiosis, producing haploid gametes that meet up during fertilization to produce a diploid individual.
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Cells in the parents undergo mitosis, producing offspring cells that meet up during fertilization to produce an individual with half of each parent's DNA.
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Question 12 of 20

12. Question
1 point(s)

Which statement best explains the significance of meiosis in helping to maintain continuation of a species?

Meiosis produces eggs and sperm that are alike.
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Meiosis provides for chromosomal variation in the gametes produced by an organism.
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Equal numbers of eggs and sperm are produced by meiosis.
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The gametes produced by meiosis ensure the continuation of any particular species by asexual reproduction.
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Question 13 of 20

13. Question
1 point(s)

Which diagram below illustrates fertilization that would lead to development of a normal human female?

A
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B
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C
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D
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Question 14 of 20

14. Question
1 point(s)

Meiosis is necessary for reproduction to occur.

Binary fission
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Mitosis
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Asexual
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Sexual
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Question 15 of 20

15. Question
1 point(s)

Which describes how meiosis helps maintain an organism’s chromosome number over generations?

Meiosis occurs in organisms that reproduce asexually, with each parent needing half the chromosome number for faster division.
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A constant chromosome number occurs in organisms that reproduce sexually to ensure that they can reproduce by binary fission.
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A constant chromosome number occurs in organisms that reproduce asexually to ensure that they can continue to reproduce asexually.
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Meiosis occurs in organisms that reproduce sexually, with each parent contributing half of the required genetic material to the offspring.
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Question 16 of 20

16. Question
1 point(s)

Reproduction by meiosis causes each one of the four sex cells that result to have combination of DNA.

the same
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a unique
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a similar
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a genetically identical
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Question 17 of 20

17. Question

1 point(s)

Match the following definitions with their correct term.

Sort elements

contain two complete sets of inherited chromosomes and two complete sets of genes; are body cells; symbol is 2n
only contain a single set of chromosomes; only have a single set of genes; contain half number of chromosomes of body cells; gametes; symbol is n
Sperm and egg cells produced through meiosis; sex cells
Produces gametes and assures genetic diversity in sexual reproduction
Produces cells for growth, repair, replacement

Diploid cells

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Haploid cells

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Gametes

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Meiosis

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Mitosis

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Question 18 of 20

18. Question
1 point(s)

Agricultural scientists develop a way to insert a third chromosome into the diploid body cells of a watermelon plant to create a seedless fruit. How could this extra chromosome affect watermelon offspring?

All gametes produced would have twice the number of chromosomes, so offspring would be tetraploid.
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Because the chromosome was inserted into a diploid body cell, it would not be passed to offspring through meiosis.
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The extra chromosome would be passed to offspring through meiosis, so each generation would produce seedless fruit.
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With three chromosomes, the watermelon would produce three times as many offspring as a normal watermelon plant.
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Question 19 of 20

19. Question

1 point(s)

Match the following descriptions of Meiosis 1 with their correct phase.

Sort elements

The chromosomes condenses, and the nuclear envelope breaks down. Crossing-over occurs.
Parts of homologous chromosomes move to the equator/center of the cell.
Homologous chromosomes move to the opposite parts of the cell.
Chromosomes gather at the poles of the cells. The cytoplasm divides.

Prophase 1

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Metaphase 1

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Anaphase 1

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Telophase 1

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Question 20 of 20

20. Question

1 point(s)

Match the following descriptions of Meiosis II with their correct phase.

Sort elements

A new spindle forms around the chromosomes.
Chromosomes line up at the equator/center of the cell again.
Centromeres divide. Chromatids move to the opposite poles of the cells.
A nuclear envelope forms around each set of chromosomes. The cytoplasm divides.
Results in 4 haploid daughter cells, half the chromosomes of parent cell, with each containing their own unique combination of DNA.

Prophase II

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Metaphase II

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Anaphase II

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Telophase II

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Cytokinesis II

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