3. reproduction

Question 1

features of the sperm gamete

site of gamete production?
number of gametes produced?
relative size of gamete?

Answer 1

site of gamete production - testes
number of gametes produced - many
relative size of gamete - small

Question 2

features of the egg gamete

site of gamete production?
number of gametes produced?
relative size of gamete?

Answer 2

site of gamete production - ovaries
number of gametes produced - few
relative size of gamete - big

Question 3

describe fertilisation in mammals

Answer 3

the haploid male gamete nucleus and the haploid female gamete nucleus fuse to form zygote - divides by mitosis to become embryo

takes place in the oviduct

Question 4

features of pollen gamete

site of gamete production?
male or female gamete?

Answer 4

site of gamete production - anther

male or female gamete - male

Question 5

features of ovule gamete

site of gamete production?
male or female gamete?

Answer 5

site of gamete production - ovary

male or female gamete - female

Question 6

what is pollination

Answer 6

the transfer of pollen grains from an anther to a stigma - this transfer may occur due to wind or insects

Question 7

describe fertilisation in flowering plants

Answer 7

pollen grain lands on the stigma and a pollen tube grows down through the style, the nucleus of the pollen grain passes down the pollen tube to fertilise the ovule (egg)

the top of the pollen tube bursts and 2 haploid gametes enter sac - gametes fuse to form zygote (seed) and ovary wall becomes fruit