Biology EOC Genetics Review

Which best describes the process shown?

• mutation in which the DNA content of the gene is ltered
• segregation of sister chromatids
• condensation and segregation of the alleles
• crossing-over which alleles are exchanged

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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

Which is the correct order?

• C,D, B, A, F, E
• D,A,F,C,E,B
• B,E,C,F,A,D
• C,B,D,A E,F

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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

A guinea pig cell has 64 chromosomes.  After mitosis, each daughter contains ___ chromosomes.

• 128
• 64
• 32
• 16

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Why is meiosis important for sexual reproduction? 

• It allows the zygote formed from fertilization to have triple the chromosome number of the organism. 
• It allows gametes to have twice the original number of chromosomes of the organism.
• It allows gametes to have half the original number of chromosomes of the organism.
• It allows the zygote formed from fertilization to have half the original number of chromosomes of the organism.

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How many daughter cells are produced in meiosis?

• 4 daughter cells
• none of these
• 3 daughter cells
• 2 daughter cells

Is the final result of meiosis haploid of diploid?

• diploid
• haploid

How many chromosomes do humans have?

• 46
• 21
• 10

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NGSS.HS-LS3-1

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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