Unit 5 Review

Which is true about asexual reproduction?

• Takes only one mate to reproduce and takes a longer time to reproduce

• Reproduces diverse offspring and takes a longer time to reproduce

• Takes a shorter amount of time to reproduce and it takes two mates to reproduce

• Takes only one mate to reproduce and takes a shorter time to reproduce

What percentage of chromosomes are contributed by a sperm cell?

• 25%

• 50%

• 75%

• 100%

Sexual reproduction requires _____ parents and asexual reproduction requires ___ parents

• 1, 1

• 1, 2

• 2, 1

• 2, 2

What is an advantage of sexual reproduction?

• Allows genetic variation

• Happens very quickly

• Only needs one parent

• Offspring are exact copies of parent

What types of cells are found only in organisms that reproduce sexually?

• blood cells

• skin cells

• neurons

• gametes

What part of our cells holds our DNA?

• cytoplasm

• nucleus

• cell membrane

• ribosomes

Before a cell can divide, what must happen?

• Nothing, it is always ready to divide

• The chromosomes must replicate

• The number of chromosomes must be reduced by half

• The number of chromosomes must triple.

If the message never gets through for a cell to stop dividing and it just keeps dividing over and over again, what can form?

• tumor

• goosebump

• freckle

• scab

In which type of cells will mitosis occur?

• egg cells

• jail cells

• germ cells

• somatic cells

After meiosis, the haploid number of chromosomes in a human sex cell is:

• 46

• 22

• 96

• 23