Your Thoughts On Biology 2010 Exam 2

[shinny]

redundancy with the genetic code = one mark i'm positive i dropped
just had no clue, related it to mutations hahah.

i talked about mutations too! so it wasn't that dumb a theory afterall!!

Well the point of redundancy is largely about mutations. Since there's multiple codons coding for the same amino acid, some mutations ('silent mutations') result in a change in a nucleotide, but not a change in the amino acid consequently produced. So basically, it's a protective mechanism against mutation.

[stonecold]

I'm, pretty sure that answer to q 1 Short answer was 2/3 yeah for the chance of being heterozygous?

i put 1/2 cause the chance of the offspring having the trait has the same chance each time and isnt affected by current offsprings? not too sure..i think vcaa does it in ur format :\

She couldn't be aa or two little alleles, otherwise she'd be shaded in, so you needed to discount it.

[sillysmile]

Tooth question was a bit strange...

Fairly easy exam i reckon.....

The thing that stumped me was the guy with the abnormal chromosomes and that one question about the centromere i didnt understand really at all... what did people get for that?

same here, had to guess...

[slothpomba]

I wrote parabolic shape and choked... then i wrote tooth spacing.. probably wrong

I think Y was the gorilla? Maybe im getting the order mixed up in my head

[slothpomba]

Tooth question was a bit strange...

Fairly easy exam i reckon.....

The thing that stumped me was the guy with the abnormal chromosomes and that one question about the centromere i didnt understand really at all... what did people get for that?

same here, had to guess...

i guessed 25%

From what people are saying here... i might of actually got the mark haha

[stonecold]

'and the jaw one, I said X was gorilla because it had molars.. and I was like, do gorillas eat meat too? :< but yeah molars and parabolic shape of teeth' confirm/deny my trusty Biology winners.

I said X was australopithicus...

It had a more parabolic jaw, and the front teeth were smaller.

[itsMRPHI]

what the hell was the answer to the centromere being inactive in chromosome 2?

[masonnnn]

the larger toothed one, X was the gorilla i believe. Larger molars as they're herbivores and large molars are good for eating fibrous plants thus also a larger jaw.

also wasn't positive about the centromere one, i think i talked about how if it had the centromere activated normal genes would've still been expressed by the homologous chromosome or sister chromatid or some crap. can't remember already hahah.

[stonecold]

what the hell was the answer to the centromere being inactive in chromosome 2?

I put that it could no longer attach to spindle fibres in mitosis and meiosis, so the chromosome number reduced, leading to the evolution of humans.

[slothpomba]

I said X was australopithicus...

It had a more parabolic jaw, and the front teeth were smaller.

Also wrote X

Bullshitted my way through the centromere one....
Probably 0 marks i reckon

[Hope]

I said X was australopithicus...

It had a more parabolic jaw, and the front teeth were smaller.

Also wrote X

Bullshitted my way through the centromere one....
Probably 0 marks i reckon

Wrote X too

and I bullshitted too. Probably 0 marks

[Raiinman]

I said X was australopithicus...

It had a more parabolic jaw, and the front teeth were smaller.

Also wrote X

Bullshitted my way through the centromere one....
Probably 0 marks i reckon

+1

[fujiismydog]

I said when the chromosomes fused, it allowed more genes to be held on a single chromosome, therefore the more complex an organism becomes the need for more genes for gene expression. Pretty much took a guess though.

The ratio I got was 2/3??

[Wally]

Hey said when the chromosomes fused, it allowed more genes to be held on a single chromosome, therefore the more complex an organism becomes the need for more genes for gene expression.

i said this too and that the lack of the centromere allowed more genes to become permanent and there's less chance of these genes being mutated or whatever. pretty much made it up!!

[jasoN-]

i made it up too
i wrote that if the centromere is inactive, chromosome A and B (the ancestral ones) cannot be inherited, and hence is removed from the gene pool (eventually). Thus the human chromosome is the only one that can be inherited
make bull shit up ftw