2.1) gamete production and fertilisation

what are gametes ?

gametes are sex cells involved in reproduction

how are gametes produced?

gametes are produced from germline cells through meiosis

are gametes diploid or haploid?

haploid - gametes contain 1 set of chromosomes (n=23)

where is sperm produced?

seminiferous tubules within the testes

where is testosterone produced?

testosterone is produced in intertistial cells of the testes

what does testosterone stimulate ?

stimulates sperm production

what type of cell division are gametes produced by ?

meiosis

prostate gland and seminal vesicles secrete

secrete fluids that maintain the mobility amd viability of the sperm, giving them energy to move more

what do ovaries contain?

ovaries contain immmature ova in various stages of development

what is each ovum surrounded by ?

each ovum is surrounded by a follicle that protects the developing ovum and secretes oestrogen if that particular egg is matured

what is secretes if an egg is matured

oestrogen

state the term of the release of an egg

ovulation

following ovulation, the follicle ....

the follicle developes into a corpus luteum, which secretes progestrogen

what does the corpus luteum secrete?

progestorgen

fertiisation - what happens after the ovum has matured ?

the matured ovum is released into the oviduct where they may be fertilised by sperm

what is a zygote

the diploid cell that results from the fertilised (sperm+ovum) egg

after the egg is fertilsed egg , it divides by ...

it divides by mitosis and goes on to form a blastocyst