Y11 BIOLOGY UNIT 2

How does a sex cell differ from a body cell?

• A sex cell does not contain chromosomes.
• A sex cell contains homologous chromosomes.
• A sex cell has the same number of chromosomes as a body cell.
• A sex cell has half the amount of genetic material as a body cell.

How do the chromosomes at the end of meiosis I compare with the chromosomes at the end of meiosis II?

• Chromosomes have one chromatid at the end of both meiosis I and meiosis II
• Chromosomes have two chromatids at the end of both meiosis I and meiosis II.
• Chromosomes have one chromatid at the end of meiosis I and two chromatids at the end of meiosis II.
• Chromosomes have two chromatids at the end of meiosis I and one chromatid at the end of meiosis II.

The diagram shows a cell during the anaphase stage of mitosis.
Justin’s teacher showed him this slide of a stage of mitosis. He noticed the slide contains two homologous pairs of chromosomes. How would this diagram be different if it showed anaphase I of meiosis instead of anaphase of mitosis?

• Each chromosome would still have two chromatids.
• The chromosomes would look the same as in mitosis.
• You would be able to see DNA in the chromosomes during meiosis.
• Homologous chromosomes would be moving to the same end of the cell.

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The diagram below shows a human cell
What type of cell is this

• a sex cell
• a body cell
• a cell about to go through mitosis
• a cell about to go through meiosis

How is meiosis related to sexual reproduction?

• Meiosis allows the offspring produced during sexual reproduction to grow and develop.
• Meiosis joins together the sex cells during sexual reproduction to produce new offspring.
• Meiosis produces the sex cells that join to form new offspring during sexual reproduction
• Meiosis produces the body cells that join to form new offspring during sexual reproduction

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The figure below shows a cell from an organism whose body cells each have four chromosomes. What is shown in this figure? 

• two chromatids
• four Chromatids
• four chromosomes
• four chromosome pairs

How does meiosis I differ from meiosis II?

• The sister chromatids separate during meiosis I, but not during meiosis II.
• The homologous chromosomes pair up during meiosis II, but not during meiosis I.
• Two sex cells are produced as a result of meiosis II, but not as a result of meiosis I.
• Chromosome number decreases by half as a result of meiosis I, but not as a result of meiosis II.

Brandy knows that chromosomes behave differently in meiosis and mitosis. What do chromosomes do in meiosis but not in mitosis?

• Each chromosome makes a copy.
• The homologous chromosomes form pairs.
• Chromosomes line up in the middle of the cell.
• D. Chromosomes condense or shorten up before cell division begins.    

Which pair shows the number of cells present both before and after meiosis II?

• 1 and 2
• 1 and 4
• 2 and 4
• 4 and 4

Which of these choices is a product of mitosis?

• egg
• sperm
• sex cell
• skin cell

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