Meiosis & Genetics Quiz

An animal's somatic cells contain 2n chromosomes. What happens to the number of chromosomes in the animal’s gametes?

• The number is reduced to n by mitosis.

• The number is reduced to n by meiosis.

• The number is increased to 4n by mitosis.

• The number is increased to 4n by meiosis.

How does crossing over contribute to greater genetic diversity?

• It results in the exchange of proteins.

• It produces new combinations of alleles.

• It reduces the number of chromosomes in each cell.

• It separates the chromosomes at the centromeres.

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Meiosis is necessary for which reproductive event to occur?

• vegetative budding
• binary fission
• cloning
• fertilization

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Which best describes the purpose of sexual reproduction?

• to produce offspring that are non-viable

• to produce offspring that are genetically identical

• to produce offspring that exhibit greater genetic variations

• to produce offspring that are genetically identical to their parents

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Which process occurs in both mitosis and meiosis?

• crossing-over

• replication of DNA

• two divisions

• division of two cells into four haploid cells

Which explains the significance of meiosis in the development of gametes?

• Meiosis produces identical daughter cells.

• Meiosis reduces the chromosome number by one-half.

• Meiosis combines an egg and a sperm to form a zygote.

• Meiosis increases the number of offspring an organism can produce.

The biological selection of a particular allele for a trait to be passed to offspring has nothing do with the selection of the allele for another trait. Which of the following supports this statement?

• law of independent assortment

• law of dominance

• law of segregation

• law of recessiveness

An error in gamete formation results in a zygote with an XXY chromosome combination. Which characteristic of an individual is affected by this combination?

• cellular respiration

• sex characteristic traits

• muscle protein structure

• nervous system formation

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The diagram below depicts a process that occurs during meiosis. Which would be the result of this process?

• an increase in genetic variety

• a decrease in genetic variety

• an increase in the number of chromosomes

• a decrease in the number of chromosomes

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NGSS.HS-LS3-2

Which of the following shows the correct products of meiosis and mitosis?

• Meiosis results in 4 haploid cells, and mitosis results in 4 diploid cells.

• Meiosis results in 4 haploid cells, and mitosis results in 2 diploid cells.

• Meiosis results in 2 diploid cells, and mitosis results in 2 haploid cells.

• Meiosis results in 2 diploid cells, and mitosis results in 4 haploid cells.