AQA A Level Biology Paper 2 - 11th June 2018 Unofficial Markscheme

For the respirometer maths question did u divide by 24 cos the unit was in hrs?

My answer for hardy weinberg was 43%

I said this ! Is it right ?!

It said something about a change to a tumour suppressor gene, I remember it’s being worded like it could include epigenetics. I wrote about mutation and increased methylation. Do you think I should have talked about 2 tumour suppressor genes as recessive?

These are my calc answers from my calculator memory in order of question number:

1.93×10^25
4.91×10^-6
296826
20400
18

It said something about a change to a tumour suppressor gene, I remember it’s being worded like it could include epigenetics. I wrote about mutation and increased methylation. Do you think I should have talked about 2 tumour suppressor genes as recessive?

Did anyone else find that the question regarding dihybrid inheritance didn’t make sense, it said that the genes were on the same chromosome( surely meaning autosomal linkage) but then I couldn’t see how 4 different phenotypes were produced when they’re autosomal linked

What did people put for the mutation not occurring in lactase gene? I wrote that it occurred in a regulatory gene, causing the lactase gene to be turned on

for the iPS question it was state whys its ADVANTAGEOUS to use ips over gene therapy so i wrote things like less chance of getting rejected from the body, uses own cells so doesnt harm another organism and raise ethical issues **** like that

Did anyone else find that the question regarding dihybrid inheritance didn’t make sense, it said that the genes were on the same chromosome( surely meaning autosomal linkage) but then I couldn’t see how 4 different phenotypes were produced when they’re autosomal linked

for the iPS question it was state whys its ADVANTAGEOUS to use ips over gene therapy so i wrote things like less chance of getting rejected from the body, uses own cells so doesnt harm another organism and raise ethical issues **** like that

Did anyone else find that the question regarding dihybrid inheritnce didn’t make sense, it said that the genes were on the same chromosome( surely meaning autosomal linkage) but then I couldn’t see how 4 different phenotypes were produced when they’re autosomal linked

Crossing over?

Think I chatted bs, but I wrote about it mutating the gene that codes for the transcription factor for the gene so the gene is not transcribed ;/ (ik thats probs 0 marks)