Cell Cycle, Mitosis, Meiosis, and Karyotypes

The activities in the cell cycle occur during specific phases. In which phase is DNA replicated ?

• Mitosis

• G1 phase

• G2 Phase

• S Phase

A student looking into a microscope notices the chromosomes lined up in the middle of the cell. What phase would come next

• A

• B

• C

• E

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NGSS.HS-LS1-4

1. Interphase is ________

• the time gap between meiosis I and meiosis II.

• a time of cell growth and development.

• a phase that includes the S phase and M phase.

• Process of dividing the cytoplasm

Cancer is a disorder in which some cells have lost the ability to control their________

• surface area.

• differentiation.

• rate of cell division.

• Protein channels

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NGSS.HS-LS1-4

Why is crossing over so important ?

• It maintains the number of chromosomes in a cell

• It ensures that the resulting cells are identical

• It creates multiple alleles

• It is a source of genetic variation

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NGSS.HS-LS3-2

The diagram shown represents a female human karyotype. What mutation does she have ?

• a missing X chromosome

• a missing Y chromosome

• an extra chromosome on chromosome 9.

• a deletion of a section of chromosome 21

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NGSS.HS-LS3-2

The purpose of meiosis is to

• Produce cells that have a unique set of genetic material

• Produce cells that are genetically identical to each other

• Create genetic variation by introducing mutations

• Repair and replace damaged cells

  
  

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NGSS.HS-LS3-2

Sexual reproduction in animals depends on the production of gametes. Which of these processes produces gametes in animals?

• Mitosis

• Fertilization

• Meiosis

• Crossing over

The common field mouse, Mus musculus, contains 40 chromosomes in its somatic cells. What is this species’ haploid number?

• 80

• 20

• 10

• 40

The correct order of the phases should be :

• 3,2,5,1,4

• 4,1,5,2,3

• 1,2,3,4,5

• 2,3,1,4,5

Tags

NGSS.HS-LS1-4