Cell Division / Unit 2 Review

How many sets of chromosomes does a haploid cell have?

• 1

• 2

• 3

• 4

Answer explanation

Diploid cells have two sets of chromosomes. Haploid cells have one set.

Tags

NGSS.HS-LS3-2

What phase of the cell cycle is shown here?

• Prophase

• Anaphase

• Metaphase

• Interphase

Answer explanation

Anaphase is when the chromosomes are being pulled away from each other. (Remember A and A)

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NGSS.HS-LS1-4

Homologous pairs of chromosomes can cross over and cause genetic variation.

• True

• False

Answer explanation

Crossing over creates genetic variation in gametes. The attached figure gives a good explanation of how this works!

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

If a cell has 30 chromosomes at the start of meiosis, how many will a daughter cell have at the end?

• 15

• 30

• 60

Answer explanation

Meiosis reduces the number of chromosomes by half. (Think back to that karyotype station!)

Tags

NGSS.HS-LS3-2

Mitosis can happen at different speeds in different cells.

(Think: Onion Root Lab)

• True

• False

Answer explanation

Regions of organisms that are growing more rapidly need cell division to occur more quickly. For example, the root tip of an onion will replicate faster than the normal part of the plant.

Tags

NGSS.HS-LS1-4

When cells replicate through mitosis, they make cells that are the same size.

• True

• False

Answer explanation

Organisms grow through cells multiplying, not becoming larger. During miTosis, cells make Two identical body cells!

Tags

NGSS.HS-LS1-4

What phase of cell division is shown?

• Metaphase

• Telophase

• Prophase

• Interphase

Answer explanation

Metaphase is when the chromosomes meet in the middle. (Remember M and M)

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NGSS.HS-LS1-4

Which is responsible for repairing the human body?

• Photosynthesis

• Meiosis

• Mitosis

Answer explanation

MiTosis makes Two identical cells, which allows us to heal! If our skin needs repaired, the surrounding area will make more identical skin cells through mitosis.

Tags

NGSS.HS-LS1-4

Crossing over happens in mitosis.

• True

• False

Answer explanation

Crossing over only happens in meiosis, during the production of gametes. The process of miTosis makes Two identical cells. Crossing over would mingle/mix the DNA, resulting in variation.

Tags

NGSS.HS-LS3-2

How many haploid cells (gametes) are created at the end of meiosis?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-LS3-2