pack 2 - gametes and fertlisation

Question 1

egg cell

Answer 1

cytoplasm
haploid nucleus
lysosomes
cell membrane
lipid droplets
zona pellucida
follicle cells

Question 2

sperm cell

Answer 2

acrosome
mitochondria
haploid nucleus
flagellum

Question 3

zona pellucida

Answer 3

haden to prevent polyspermy

Question 4

lysosomes

Answer 4

release enzymes causing zona pellucida to harden

Question 5

cytoplasm

Answer 5

food source supply energy for cell divisison

Question 6

haploid nucelus

Answer 6

half chromosomes= diploid at fertilisation
genetic variation

Question 7

flagellum

Answer 7

allow sperm to swim to ovum

Question 8

mitochondria

Answer 8

aerobic respiration release enrgy in form of ATP- tail move and swim

Question 9

acrosome

Answer 9

lysosome contains and releases digestive enzymes hardening zona pellucida

Question 10

acrosome reaction

Answer 10

ovum release chemical- attract sperm
receptor on sperm bind to zona pellucida
acrosome swells and fuses with sperm cell membrane
digestive enzymes released by acrosome- exocytosis
zona pellucida is digested allowing sperm to reach ovum membrane

Question 11

cortical reaction

Answer 11

sperm genetic material enter ovum
cortical granules in cytoplasm fuse with egg cell membrane and release enzymes into zona pellucida
zona pellucida harden preventing polyspermy