AP BIOLOGY CELL CYCLE, MITOSIS, AND MEIOSIS

If a stem cell has 24 chromosomes, how many will it have at the end of meiosis?

• 24
• 12
• 6
• the number varies per species

Which of the following best describes meiosis?

• It is carried out in all tissues theat require cell replacement
• It occurs only in cells in the reproductive structures of an organism
• It happens in all of the tissues except the brain and spinal cord
• It is the first stage of mitosis

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NGSS.HS-LS3-2

When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _________________ occurs

• crossing over
• mutagenesis
• hybridization
• fertilization

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NGSS.HS-LS3-2

A haploid cell has 

• one-half of a set of chromosomes
• one set of chromosomes
• two sets of chromosomes
• four sets of chromosomes

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NGSS.HS-LS3-2

How many cells are created during Telophase II?

• 1
• 2
• 3
• 4

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NGSS.HS-LS3-2

During meiosis I, what happens? 

• Sister chromatids are split
• Homologous chromosomes are split
• Four cells are created
• None of the other choices are correct

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NGSS.HS-LS3-2

What are alleles

• different forms of the same gene
• an alternate step of the cell cycle
• body cells
• another name for gametes

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

Meiosis results in ______.

• 4 genetically distinct haploid gametes
• 2 genetically distinct cells
• 2 genetically identical cells
• 4 genetically identical cells

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NGSS.HS-LS3-2

Trisomy is a genetic disorder that ________

• has three sets of chromosomes
• has three copies of a particular chromosome
• that is curable
• none of the above

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NGSS.HS-LS3-1

Human eggs and sperm are _____, and each has ____ chromosomes.

• diploid, 23
• diploid, 46
• haploid, 23
• haploid, 46

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NGSS.HS-LS3-1

NGSS.HS-LS3-2