ATAR Notes: Forum

VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Biology => Topic started by: Jamesy_112 on June 19, 2012, 08:29:17 pm

Title: Meiosis trouble
Post by: Jamesy_112 on June 19, 2012, 08:29:17 pm

Heyy,

I don't quiet understand the process of meiosis, for example the differences with prophase I and     prophase II and anaphase I and anaphase II, does the process of prophase I and prophase II occur straight after on other or does it go prophase I anaphase I metaphase etc then prophase II anaphase II, what do the second stages of prohase and anaphase etc actually do?

thank you

Title: Re: Meiosis trouble
Post by: ggxoxo on June 19, 2012, 11:50:37 pm

I recommend you watch a McGraw Hill animation: http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter3/animation__how_meiosis_works.html

Title: Re: Meiosis trouble
Post by: SeanLee95 on June 20, 2012, 01:04:18 am

http://www.khanacademy.org/science/biology/v/phases-of-meiosis this vid should help.

Title: Re: Meiosis trouble
Post by: paulsterio on June 20, 2012, 01:06:19 am

it's all the ones first and then the twos

so prophase I, metaphase I...etc. then prophase II...etc.

In the first cycle, initial cell will split into two diploid cells, second division each diploid cell will now split into two haploid cells

Title: Re: Meiosis trouble
Post by: Jamesy_112 on June 20, 2012, 11:04:13 am

thanks heaps guys

Title: Re: Meiosis trouble
Post by: Jamesy_112 on June 20, 2012, 11:30:58 am

One more question :),,

i dont quiet get cell respiration and steps involved, like the krebs cycle?, what does the krebs cycle actually do?

Title: Re: Meiosis trouble
Post by: paulsterio on June 20, 2012, 03:27:57 pm

Kreb cycle (Citric Acid Cycle/TCA Cycle) will take pyruvate, convert it to Acetyl-CoA and use the energy in it to load the electron carriers (NAD+ -> NADH and FAD -> FADH2)

(http://content.answcdn.com/main/content/img/oxford/Oxford_Chemistry/0192801015.krebs-cycle.1.jpg)

Title: Re: Meiosis trouble
Post by: Jamesy_112 on June 23, 2012, 02:13:14 pm

Quote from: paulsterio on June 20, 2012, 03:27:57 pm

Kreb cycle (Citric Acid Cycle/TCA Cycle) will take pyruvate, convert it to Acetyl-CoA and use the energy in it to load the electron carriers (NAD+ -> NADH and FAD -> FADH2)

(http://content.answcdn.com/main/content/img/oxford/Oxford_Chemistry/0192801015.krebs-cycle.1.jpg)

Thanks heaps for that