AP Biology Unit 5 Heredity

Meiosis makes sperm and egg cells. In humans, sperm and egg cells each have _____ chromosomes. Therefore a fertilized human egg cell (sperm and egg cell combined) would create a cell with _____ chromosomes.

• 23, 46
• 46, 23
• 2, 4
• 50, 100

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What kind of cells are made in MEIOSIS?

• Haploid Gametes
• Diploid Somatic Cells
• Skin Cells
• Liver Cells

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The chromosomes that pair up during meiosis, are called __________ chromosomes.  

• homozygous 
• asexual
• homologous
• genes

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NGSS.HS-LS3-2

When homologous chromosomes match up, they form a structure call a ___________.

• tetrad
• triad
• diploid
• gamete

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A male shark has 40 chromosomes in each of its sex cells. How many would be present in its body cells?

• 20
• 40
• 80
• 160

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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

The purpose of meiosis is to form ________ cells.

• body
• sex
• somatic
• brain

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Crossing over helps promote 

• male genotype
• genetic variation
• DNA replication
• mitosis

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NGSS.HS-LS4-2

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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

Crossing over is important because....

• It prevents mutations from entering the gametes. 
• It allows for even distribution of chromosomes in the gametes.
• It allows for more genetic diversity of gametes.
• It allows for genetic uniformity of gametes. 

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NGSS.HS-LS3-2

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