Meiosis - quick hit

This produces 2 identical cells.

• mitosis
• meiosis

A human usually has 46 amount of chromosomes in their body cells, how many chromosomes are in human gametes?

• 6

• 23

• 92

• 46

Answer explanation

Remember - gametes generally have HALF the number of chromosomes found in body (somatic) cells.

If the diploid number of an organism is 22, the haploid number is

• 22

• 11

• 44

• 88

Answer explanation

Diploid 🠖 2 sets of chromosomes

Haploid 🠖 1 set of chromosomes

Which of the following cells is a gamete?

• egg
• bone
• heart
• muscle

The result of meiosis is:

• two diploid cells

• two haploid cells

• four diploid cells

• four haploid cells

Answer explanation

Diploid 🠖 2 sets of chromosomes

Haploid 🠖 1 set of chromosomes

Identify a purpose of meiosis. Select all that apply.

• Produce gametes for reproduction.

• Repair damaged or dead cells.

• Reduce the chromosome number.

• Growth of organisms from birth to adulthood.

Answer explanation

The other two choices are functions of mitosis, but meiosis is for creating gametes, which have HALF the number of chromosomes of body cells.

Crossing over takes place during...

• Prophase II

• Prophase I

• Interphase

• Metaphase I

How many times in meiosis does the cell divide?

• 2

• 4

• 3

• 1

Answer explanation

There are TWO rounds of division in meiosis, aptly named, "Meiosis I" and "Meiosis II."

When does DNA replicate?

• interphase

• prophase I

• telophase I

• cytokinesis

Answer explanation

DNA replication specifically happens in the S phase, which is part of interphase.

This is BEFORE division has started.

True or False: Two sperm taken from the same father are identical.

• True
• False