2009 HSC Genetics Option (1 Viewer)

[bayan92]

Discuss your answers to the genetics option here.

a) (i) A, B and O
(ii) Punnet square and 25% chance of O

b) (i) Bt corn
(ii) Greater variation --> more chance of surviving in an environment change

c) Location 1 = Transcription
Location 2 and 3 = Translation

d) What are linked genes and talked about the practical we did.

e) Mutations --> Sickle cell anaemia and Cystic Fibrosis
Cystic Fibrosis --> Cause and symptoms
Process of Gene Therapy --> Recombinant DNA technology and dripping into the lungs

 

[Venom.]

I swear I pretty much did exactly what you did; except not sickle cell, I just did cystic fibrosis. Fukn good section tbh, the 7 marker was open to ranting about all forms of mutations etc.

Good good test.

 

[Bunzhou]

i swear i pretty much did exactly what you did; except not sickle cell, i just did cystic fibrosis. Fukn good section tbh, the 7 marker was open to ranting about all forms of mutations etc.

Good good test.

+1

 

[hermine]

Discuss your answers to the genetics option here.

e) Mutations --> Sickle cell anaemia and Cystic Fibrosis
Cystic Fibrosis --> Cause and symptoms
Process of Gene Therapy --> Recombinant DNA technology and dripping into the lungs

i was tossing up between putting cystic fibrosis in there because its not caused by mutation, its caused by inheritance of homozygous recessive inheritance. so I ranted on about down syndrome and the potential of gene therapy cause the question asked "could lead to management...using gene therapy" :S
the rest of the option was pretty straight forward though, fair test

 

[q3thefish]

Was gay'd

 

[Lachycharts]

Discuss your answers to the genetics option here.

a) (i) A, B and O
(ii) Punnet square and 25% chance of O

b) (i) Bt corn
(ii) Greater variation --> more chance of surviving in an environment change

c) Location 1 = Transcription
Location 2 and 3 = Translation

d) What are linked genes and talked about the practical we did.

e) Mutations --> Sickle cell anaemia and Cystic Fibrosis
Cystic Fibrosis --> Cause and symptoms
Process of Gene Therapy --> Recombinant DNA technology and dripping into the lungs

A)i) Was I^A, I^B and I^O - You probably won't get that mark because A, B and O refer to blood type ---> phenotype. But meh.

B)ii) I am pretty sure it said benefit to humans which doesn't really answer the question. Also, with cloning there is less variation and hence less chance of surviving an environmental change.

 

[hermine]

A)i) Was I^A, I^B and I^O - You probably won't get that mark because A, B and O refer to blood type ---> phenotype. But meh.

I think the allele for O is i not I^O, it's the recessive alelle of the three

 

[cd285]

what the hell were they asking for regarding the model of linkage question???
i went on about chromosome maps and how they help identify linked genes anybody willing to share what they put?

 

[Venom.]

what the hell were they asking for regarding the model of linkage question???
i went on about chromosome maps and how they help identify linked genes anybody willing to share what they put?

They wanted you to talk about a prac you did for modelling gene linkage. I linked it in with linked genes/crossing over leading to recombinants etc. My prac was pretty bullshit, we did it with snakes and gummy bears LOL

 

[Lachycharts]

We did one of our assessments on gene linkage so wrote 6 pages on that: what it was, examples, showed a model then demonstrated the effect on expression using punnet squares, etc.
I wrote 12 pages in total for genetics.

 

[Venom.]

We did one of our assessments on gene linkage so wrote 6 pages on that: what it was, examples, showed a model then demonstrated the effect on expression using punnet squares, etc.
I wrote 12 pages in total for genetics.

6 pages for six marks? Eh. I wrote 3 for the 7 marker, and I think I covered everything required.

 

[Lachycharts]

Well, actually, maybe it was four pages? And I had models and working out so that made up quite a lot of it.

And yeah, I didn't really like the 7 marker but I think I wrote 5 pages for that one. I gave a description on all Arrangements (deletion, invertion, translocation and duplication/amplification), Chromosome number changes (trisomy and polyploidy) then gene mutations (substituation and frameshift) and then talked about Cystic Fibrosis and then I read an article in the newspaper while I was at study camp about an NRG gene being in 50% of all breast cancer patients and so I said that a greater understanding of the mutations could be used to create new therapies for that, etc. I rambled like hell but the content was there...hopefully ha ha.

 

[Aplus]

a) (i) A, B and O

What the hell, isn't it:

• A - I^AI^A or I^Ai
• B - I^BI^B or I^Bi
• AB - I^AI^B
• O - ii

 

[Venom.]

What the hell, isn't it:

• A - I^AI^A or I^Ai
• B - I^BI^B or I^Bi
• AB - I^AI^B
• O - ii

It was a basic identify question, I think it was just asking for I(A), I(B), I(O)

 

[Lachycharts]

What the hell, isn't it:

• A - I^AI^A or I^Ai
• B - I^BI^B or I^Bi
• AB - I^AI^B
• O - ii

Your A and B ones are right.
And your O looks right too, it's just that I have always been taught that the allele for O type is I^O but I think they will be a tad lenient. If not, meh. 1 mark.

 

[brodiee]

i wrote about how the better understanding has led to better use of genetic therapy. i did two examples not sure if correct.
Cancer tumours- how scientists insert genes from virus's into the tumour so the body recognises it as 'foreign' and attacks it
and i also just did the standard cystic fibrosis example.
could the cancer one work? cos reli a tumour is a mutation lol

 

[tiffuneez]

my example of cloning was dolly the sheep (pathetic i know, but i couldnt think of anything else ) and for the one benefit i just said all this bullshit about replacing tissues. I don't think that's correct though....

 

[arjungamer123]

my example of cloning was dolly the sheep (pathetic i know, but i couldnt think of anything else ) and for the one benefit i just said all this bullshit about replacing tissues. I don't think that's correct though....

I wrote about Dolly too. It's valid. I wrote that the advantages are mostly economical- because if we replicate a sheep with good characteristics, such as good wool yields, farmers can get more money etc.

For the 7 marker, I did what others did, where I rambled on what gene mutations, base mutations and chromosome number arrangements are and sai how gene therapy could be used in each case. I.e- if a trisomy occurs, we can replace the whole genome with a genome of proper chromosome number and thus resolve the problem.

 

[be.yourself]

mwahaha.
twas ok.

 

[Triquetral]

I swear I pretty much did exactly what you did; except not sickle cell, I just did cystic fibrosis. Fukn good section tbh, the 7 marker was open to ranting about all forms of mutations etc.

Good good test.

Ahhh good good. I went on a massive rant about different mutations, gene cloning, recombinant DNA, gene therapy for cystic fibrosis...felt like a "State everything you learn't in the genetic module" type question lol. Slightly annoyed everyone found the exam pretty easy as well but hey what can you do...