It's over!

[shokstar]

I finished and had time to go through everything again!! And changed like 10 mistakes too.

[kenhung123]

YAC's are made with a centromere so that the bacteria when it divides replicates the Chromosome and spindle fibres can attach to it so that a YAC chromatid will enter the daughter cells.

Im pretty sure you needed to say something about the size of DNA because it said YAC was a much larger DNA molecule.

[kenhung123]

What did you guys put for that question about fossil formed? It was so vague. Was it impression fossil or what?

[shinny]

The Wagyu CHSI allele was isolated and given a fluorescent tag. it was introduced into a yeast cell as a large, independent, cytoplasmic chromosomal segment called a yeast artificial chromosome (YAC). in addition to the allelic DNA, a YAC includes a centromere and a replication sequence. the yeast cells are then incubated in the presence of growth stimulants and given time to replicate. this procedure is similar to genetic engineering of bacterial plasmids, however the YAC is able to contain much larger pieces of DNA than a plasmid.
cii bacterial plasmids lack a centromere. why are yacs made with a centromere
iii. what term describes the process of copying a gene

c.ii. Yeasts are eukaryotic organisms and hence duplicate DNA via mitosis, which requires the centromere as an anchor point for spindle fibres during mitosis. In contrast, bacteria duplicate DNA via binary fission which does not require spindle fibres.

If this was a one marker, simply stating 'to allow replication' MIGHT be enough.

c.iii. Under the scenario, I'm inclined to say cloning as the emphasis of the scenario is genetic engineering as stated. If they wanted to test DNA replication, they'd ask specifically for it. But as I said previously, depends on leniency of VCAA markers.

[kenhung123]

The photo is of is an Archaeopteryx.
Rapid sedimentation by silt/sand, most likely underwater, so that the fossil is protected from scavengers/bacteria and so "hard" parts of the bird can be fossilised over a long time.

I just said several sedimentary layers was needed to compress over long periods of time. It didn't says what conditions was needed so I didn't bother including it. Is that wrong or?

[emkate]

The photo is of is an Archaeopteryx.
Rapid sedimentation by silt/sand, most likely underwater, so that the fossil is protected from scavengers/bacteria and so "hard" parts of the bird can be fossilised over a long time.

i said something along those lines...rapid burial with no oxygen so bacteria can't survive

[10weid]

surely to jst say rapid burial by sediment reduces exposure to sacvengers and decomposers, hence increasing th elikelihood of preservation is enough?

[kenhung123]

It asked How though.

[silva]

What did you guys reckon for the footprint question something like "how could the scientists have known it was from a hominid organism"- i had little idea and said lack of an opposable big toe :/

and the marble fat DNA marker qs-was it bc there are a number of genes controlling the level of marble fat in cattle>>

[10weid]

to answer how, u say that it is rapidly buried by sediment...how is it buried? cos it is matee...

[shea43]

What did you guys reckon for the footprint question something like "how could the scientists have known it was from a hominid organism"- i had little idea and said lack of an opposable big toe :/

and the marble fat DNA marker qs-was it bc there are a number of genes controlling the level of marble fat in cattle>>

yeah i said the same thing. Only logical thing that came to mind

[biolstar]

The q said
Describe how this fossil could have been formed

[kenhung123]

What did you guys reckon for the footprint question something like "how could the scientists have known it was from a hominid organism"- i had little idea and said lack of an opposable big toe :/

and the marble fat DNA marker qs-was it bc there are a number of genes controlling the level of marble fat in cattle>>

Apparantly its the heel. Heel bone is the evidence of bipedalism.

yeah i said the same thing. Only logical thing that came to mind

[shea43]

I said rapid burial, low oxygen and bacteria levels

[10weid]

just talked 2 my dad, hes a gynaecologological oncolosgist, sed that p53 gene mutatuoon is a known mutation and that it is inherited..so maybzz the daughet would inherit it??