It's over!

[shinny]

no but its not the contraction of spindle fibres that creates the movement, its the contraction of the proteins in the centromere of the chromosome. just another quality ambiguous question from VCAA

Spindles fibres are proteins. They do contract to split contromeres.

its the proteins in the kinetochore of the centromere that create the movement

Heinemann biology 2 text book says in anaphase the spindles contract to split the contromere...that was the most appropriate answer anyway

They don't necessarily contract; they actually act more like a stick of Lego blocks. Blocks get added and subtracted to lengthen/shorten it. However, definitely beyond VCE level and just a technicality really. As you said, B seems to be the most 'appropriate' answer. I think c was a distractor, but is the process of oogenesis (female meiosis) even in the unit 4 course?

EDIT: Actually, wrong.

[Studyinghard]

Was the gel electrophoresis 2 bands 105 60kbp?

i had one band :S i thought it said that they had no history of the disease (the one we had to label the bands for ) what did people get?

I had two bands.

idk about this question but having one bad on that is dodgy becuz it was worth 2 marks so if u have 105 and 65 or whatever it was then that would be a good guess. never liked those questions.

[qshyrn]

i think its one band as homozygous.....      and affected  (auto recessiv)

[kenhung123]

Was the gel electrophoresis 2 bands 105 60kbp?

That question was interesting because it was 2 marks (I remember clearly because I was wondering what else do I need)
I just labelled on the side 165kbp and the thick band
i had one band :S i thought it said that they had no history of the disease (the one we had to label the bands for ) what did people get?

i had one really thick band on the 100 line because i think it said the person was unaffected and im pretty sure the disease was a recessive one. so the band asked for unaffected homozygous so i put one thick band to show two 105 pairs..anyone else?

i put a single band at 165kb, as the restriction enzyme wouldnt cut the DNA, meaning the piece is intact and is 165kb

[Studyinghard]

no but its not the contraction of spindle fibres that creates the movement, its the contraction of the proteins in the centromere of the chromosome. just another quality ambiguous question from VCAA

Spindles fibres are proteins. They do contract to split contromeres.

its the proteins in the kinetochore of the centromere that create the movement

Heinemann biology 2 text book says in anaphase the spindles contract to split the contromere...that was the most appropriate answer anyway

They don't necessarily contract; they actually act more like a stick of Lego blocks. Blocks get added and subtracted to lengthen/shorten it. However, definitely beyond VCE level and just a technicality really. As you said, B seems to be the most 'appropriate' answer. I think c was a distractor, but is the process of oogenesis (female meiosis) even in the unit 4 course?

nope its not. its just general meiosis

[kenhung123]

Was the gel electrophoresis 2 bands 105 60kbp?

i had one band :S i thought it said that they had no history of the disease (the one we had to label the bands for ) what did people get?

I had two bands.

idk about this question but having one bad on that is dodgy becuz it was worth 2 marks so if u have 105 and 65 or whatever it was then that would be a good guess. never liked those questions.

Wait was it homozygous mutation or normal?

[Studyinghard]

i think its one band as homozygous.....      and affected  (auto recessiv)

im pretty sure they were looking for the un affected one

[gwood21]

Was the gel electrophoresis 2 bands 105 60kbp?

i had one band :S i thought it said that they had no history of the disease (the one we had to label the bands for ) what did people get?

I had two bands.

idk about this question but having one bad on that is dodgy becuz it was worth 2 marks so if u have 105 and 65 or whatever it was then that would be a good guess. never liked those questions.

maybe 1 mark for the single band and 1 mark for the labelled length?

[shinny]

Doesn't even matter because the first polar body doesn't even divide according to the picture that you have to download page up.

The first polar body CAN divide. The first diagram given shows this with the annotation 'may not occur'.

[qshyrn]

i think its one band as homozygous.....      and affected  (auto recessiv)

im pretty sure they were looking for the un affected one

im pretty sure they were looking for the affected one lol
CAN SOMEONE CONFIRM
if it was the unaffected one, im gonna go fukn nuts

[kenhung123]

Was the gel electrophoresis 2 bands 105 60kbp?

i had one band :S i thought it said that they had no history of the disease (the one we had to label the bands for ) what did people get?

I had two bands.

idk about this question but having one bad on that is dodgy becuz it was worth 2 marks so if u have 105 and 65 or whatever it was then that would be a good guess. never liked those questions.

maybe 1 mark for the single band and 1 mark for the labelled length?

Thats what I did but hmm if its homozygous AFFECTED then its 2 thick bands 105+65.
homozygous NORMAL would be 1 thick band 165 and probably a band indication on control lane

[Studyinghard]

Doesn't even matter because the first polar body doesn't even divide according to the picture that you have to download page up.

The first polar body CAN divide. The first diagram given shows this with the annotation 'may not occur'.

my god if all u biology geniuses put together cant decide what the answer is then how is one person meant to get that right in an exam

[cipherpol]

i think its one band as homozygous.....      and affected  (auto recessiv)

im pretty sure they were looking for the un affected one

im pretty sure they were looking for the affected one lol

Wasn't the unaffected one the one which had 105 and 60 shown on it?

[silva]

Was the gel electrophoresis 2 bands 105 60kbp?

i had one band :S i thought it said that they had no history of the disease (the one we had to label the bands for ) what did people get?

I had two bands.

idk about this question but having one bad on that is dodgy becuz it was worth 2 marks so if u have 105 and 65 or whatever it was then that would be a good guess. never liked those questions.

i'm pretty sure you has to draw a 105bp strand and a 65bp strand, bc the normal allele was cut with the RE whereas the mutated allele wasnt, it showed this on the DNA sequence diagram above
hence bc the person had no history of the mutated allele, the RE would have cut the DNA at those 2 places to form a 65 and 105 bp strand

[simpak]

I thought it was the unaffected one.
I thought it...yeah SOMEONE GET THE PAPER OUT.