Sexual reproduction in mammals

Question 1

Function of flagellum

Answer 1

For movment to the egg

Question 2

`Function of mitochondria

Answer 2

For aerobic repriation and to produce ATP for energy for teh movemtn of the flagellum

Question 3

Function of teh acrosome

Answer 3

Contains digestive enzymes
Acrosome reaction
Zona pellucida digetsion
Sperm cell need to fuse withj the cell membrane of teh egg

Question 4

Explain the imporant of meiosis

Answer 4

Halves the chromosome number to propduce a haploid nucleus so that at fertilisation a full set of chromosomes is restored

Question 5

How do we prevent polyspermy

Answer 5

Sperm cell fuses with the memrbane of teh cell membrane
Cortical granules moves towards the cell memrbae of the egg cell.
The cortical reaction happens where the cortical granules releases subtances into jelly layer which causes the hardening of the zona pellucida
There is a change in charge of egg cell membrane

Question 6

Crossing over

Answer 6

Swapping sections of chromatids

Question 7

Independent assortment

Answer 7

Gives rise to new combinations of paternal and maternal chromosomes

Question 8

How is the sperm adapted for its function

Answer 8

Haploid nucleus allows restoration of a full set of chromosomes during fertilisation