mitosis and meiosis review

What percentage of chromosomes are contributed by a sperm cell?

• 75%
• 25%
• 50%
• 100%

Sexual reproduction requires _____ parents and asexual reproduction requires ___ parents

• 1,1
• 2,2
• 2,1
• 1,2 

What is an advantage of sexual reproduction?

• Allows genetic variation
• Only needs one parent
• Happens very quickly
• Offspring are exact copies of parent

Which is a type of Asexual Reproduction

• Flowers being pollinated
• Binary fission
• Chickens laying fertilized eggs
• Conjugation

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

• blood cells 
• neurons 
• skin cells 
• gametes 

What part of our cells holds our DNA?

• cytoplasm
• cell membrane
• nucleus
• ribosomes

Before a cell can divide, what must happen?

• Nothing, it is always ready to divide
• The number of chromosomes must be reduced by half
• The  chromosomes must replicate
• 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
• freckle
• goosebump
• scab

In which type of cells will mitosis occur?

• egg cells
• germ cells
• jail cells
• Somatic cells

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

• 46
• 92
• 22
• 23