Part 2: Sexual Reproduction Notes

Question 1

What is sexual reproduction

Answer 1

Stem cells use meiosis to make gametes with half the chromosomes.

Question 2

Gonads in complex animals (chordates, mollusks)

Answer 2

Sperm made by testes
Eggs made by ovaries

Question 3

Gonads in simple animals (sponges, cnidarians)

Answer 3

No testes or ovaries

Question 4

Why is it important

Answer 4

Makes genetic variation and diversity

Question 5

Gonads in flowering plants

Answer 5

Sperm made by anther
Eggs by ovules

Question 6

Gonads in fungi

Answer 6

Gametangia

Question 7

How does meiosis split chromosomes

Answer 7

23 pairs (diploid) to 23 single (haploid)

Question 8

2 gametes needed for sexual reproduction

Answer 8

Sperm and egg cells

Question 9

What are gonads

Answer 9

Special tissue that make sperm and egg cells

Question 10

How long does it take for stem cells in human to become mature

Answer 10

64 days

Question 11

How long does sperm cell last in testes

Answer 11

2 weeks

Question 12

How females have egg cells that they will produce

Answer 12

Have all the egg cells they will ever produce at birth

Question 13

How long do egg cells last

Answer 13

24-72 hours after they mature