Asexual Reproduction Notes

Question 1

What is fertilization?

Answer 1

sperm cell fuses with egg cell to make zygote

Question 2

How sperm cell fuses with egg (step 1)

Answer 2

Sperm approaches egg in deniable reproductive tract or near egg

Question 3

How sperm fuses with a egg (step 2)

Answer 3

Sperm uses enzymes in across to break through eggs outer layers

Question 4

How sperm fixed with a egg (step 3)

Answer 4

Receptor proteins on sperm bind to specific receptor proteins on eggs surface

Question 5

How sperm fuses with a egg (step 4)

Answer 5

Once sperm bonds egg prevents other sperm from entering

Question 6

How sperm fuses with a egg (step 5)

Answer 6

Sperm nucleus enters egg and genetic material combines to make diploid zygote

Question 7

What is zygote?

Answer 7

Single cell formed right after fertilization

Question 8

What is embryo!

Answer 8

From fertilization up to 8 weeks - organs begin forming

Question 9

What is fetus?

Answer 9

From 9 weeks to birth - growth and development of systems

Question 10

How fraternal twins (dizygotic) form

Answer 10

2 eggs are released and fertilized by 2 different sperm. They are genetically unique, can be different sexes.

Question 11

How identical twins (monozygotic) form

Answer 11

1 egg is fertilized by 1 sperm