Meiosis

Meiosis

Unit 5 Concept 3 Review

Multiple Choice

MITOSIS results in ___ cells which are ___

• 4, unique

• 2, unique

• 2, identical

• 4, identical

Mitosis is for Growth and Repair

Body cells use mitosis to make exact replicas of themselves to repair your body and grow/expand

Multiple Choice

What type of cells undergo mitosis?

• Somatic cells

• Gametic cells

A Somatic Cell is a Body Cell

Skin, heart, brain, kidney, muscle. bone, etc.

Multiple Select

Which of the following cells are NOT somatic cells? (Select ALL that apply)

• Eye cells

• Sperm cells

• Intestinal cells

• Eggs cells

Eggs and Sperm cells are GAMETES

• Gametes are haploid cells that result from meiosis

Fill in the Blank

If a somatic (body) cell in a human has 46 chromosomes, how many does a sperm/egg cell have?

Haploid cells have HALF the chromosomes as somatic (diploid) cells

Haploid = half

Diploid = double

Fill in the Blank

If a frog sperm cell has 10 chromosomes, how many are in a frog muscle cell?

Fill in the Blank

If a dog brain cell has 80 chromosomes, how many are in a dog egg cell?

Meiosis is used to reduce the number of chromosomes

• Starts with 1 diploid body cell (from testes or ovaries)

• Ends with 4 haploid gametic cells (sperm or eggs)

Multiple Choice

The goal of meiosis is to increase genetic

• diversity

• uniformity (sameness)

Multiple Choice

The main mechanism for increasing genetic diversity in offspring is:

• Photosynthesis

• Mitosis

• Crossing Over

Crossing over creates randomness

• Homologous chromosomes exchange DNA

• Makes it so every sperm/egg cell created has a unique DNA combination

• No two gametes are alike (like snowflakes!)