Genetics Part 1

When a cell divides, what do we call the 2 new cells?

• mother cells
• father cells
• daughter cells
• son cells

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Before a cell can divide, what must happen?

• Nothing, it is always ready to divide
• The number of chromosomes must be cut in half
• The chromosomes must be copied
• The number of chromosomes must triple.

When you start with 1 cell, at the end of mitosis, how many identical cells will you have?

• 1
• 2
• 3
• 4

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NGSS.MS-LS3-2

Another name for a sex cell is a:

• gamete
• embryo
• bone cell
• muscle cell

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NGSS.MS-LS3-2

If you were able to count the number of chromosomes of a body cell in every organism, you would find:

• Every organism has the same number of chromosomes
• Each organism has a specific number of chromosomes that are associated with it.
• There are different numbers of chromosomes in different cells of the same organism.
• There is no way to determine the number of chromosomes in any organism except humans.

Why is sexual reproduction better than asexual reproduction?

• It gives an advantage to organisms to be different than the rest, if the environment changes.
• It is better for all organisms to be the same.
• It happens faster.
• It helps skin cells divide faster to heal wounds.

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NGSS.MS-LS3-2

NGSS.MS-LS4-4

If you have a gap in your skin (such as a cut), what will happen?

• The cells next to it will divide faster until the hole is covered up, and then go back to normal mitosis speed.
• The cells next to it will stretch to cover the hole.
• The cells next to it will send a signal to the brain to stop mitosis.
• The cells of the brain will send repair cells to fix the problem. 

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NGSS.HS-LS1-4

When a starfish grows a new body off a broken arm, what kind of reproduction is this?

• Sexual
• Differentiation
• Asexual 
• Specialization

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NGSS.MS-LS3-2

Where does an off spring get its traits in asexual reproduction?

• From both parents
• From only one parent
• From neither parent
• There are no traits handed down

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NGSS.MS-LS3-2

What percentage of chromosomes are handed down by a sperm cell?

• 75%
• 25%
• 50%
• 100%

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NGSS.HS-LS3-1