imqt
Premium Member
- Joined
- Aug 17, 2007
- Messages
- 236
- Gender
- Female
- HSC
- 2008
boony3 said:can anyone please help me with the whole chromosome/gamete/crossing over/meiosis thing? or tell me where i can find some handy info that is easy to understand.
I have no idea what this stuff is on about cept for the fact it provides variation within a species or something...help pleaseee
hye i had the same problem with meosis...im on youtube now..http://www.youtube.com/watch?v=R_LUJSqeSrI&feature=related
this is an excellent demonstration! highly recommended! made it much easier for me
this is how i now understand meosis (correct me whereever i'm wrong please)
- individual chromosomes duplicates (connected by a centrometer?)
- homologous pairs come together
- crossing over may occur where homologous chromosomes exchanges sections = this leads to new alleles and combinations of genes
- then the homologus chromosomes line up in the centre of the cells and segregate, in the 2nd cell division...two new cells formed
- they further split to form 4 haploid cells (gametes) which each contain different chromosomes from each parent in random assortment
does this all sound right? anything else i need to know?