AQA Additional Biology 2: 14th May 2013

Original post by Applequestria

I got confused by that too, but I put in the answers of 4 and 8 for species A and species B respectively - apparently, that should be correct according to my biology teacher.

Yes! Thank you!

Reply 23

The question about chromosomes were slightly confusing. In the boxes where you had to fill in the amount of chromosomes I wrote "23" in both boxes then "46" in the box underneath. A few of my friends wrote this, however other friends are telling me that you had to count the number of chromosomes under "Species A" and "Species B" and fill those in instead. Apparently it was 4 and 8 to = 12 in total? What did you guys write?

Reply 24

Raeesah123

Original post by Applequestria

I got confused by that too, but I put in the answers of 4 and 8 for species A and species B respectively - apparently, that should be correct according to my biology teacher. Quite a few people got confused by the boxes and randomly ticked a box ^.^

I found the HEXA gene questions the hardest, actually. The six mark question was fairly easy.

It'd be good if someone made an unofficial mark scheme for B2 and B3 :P

Yes they're the answers a lot of my friends got. I put 2 and 5 down -.- oh haha..

I found the HEXA Gene question ok, it took me a while to understand it though. It took me 10 minutes to figure out that it was caused by a recessive allele because the punnet square was soo confusing! I didn't read what the context for the six marker was properly, so wrote about all of the enzymes instead of just lipase :frown:

Ermm I was just going to say that :wink:

Reply 25

Raeesah123

Original post by AS777

The question about chromosomes were slightly confusing. In the boxes where you had to fill in the amount of chromosomes I wrote "23" in both boxes then "46" in the box underneath. A few of my friends wrote this, however other friends are telling me that you had to count the number of chromosomes under "Species A" and "Species B" and fill those in instead. Apparently it was 4 and 8 to = 12 in total? What did you guys write?

Yep, that's right it should be 4 and 8 = 12

Reply 26

Applequestria

5

Original post by AS777

The question about chromosomes were slightly confusing. In the boxes where you had to fill in the amount of chromosomes I wrote "23" in both boxes then "46" in the box underneath. A few of my friends wrote this, however other friends are telling me that you had to count the number of chromosomes under "Species A" and "Species B" and fill those in instead. Apparently it was 4 and 8 to = 12 in total? What did you guys write?

Yep, 12 is right.

Reply 27

Yeah, I'd say around 80% of the people in my class wrote about all enzymes instead of just lipase.

Reply 28

What about the probability tree diagram?

Was it like this : Hh Hh
H h H h
HH Hh Hh hh

???

Reply 29

Original post by AS777

What about the probability tree diagram?

Was it like this : Hh Hh
H h H h
HH Hh Hh hh

???

Yeah, I think so. Oh, and what about the question with the clover in the field?

Reply 30

tayshufflebotham

What did everyone put for the question about the number of squares in the quadrat?

Reply 31

Original post by StudyScience98

Yeah, I think so. Oh, and what about the question with the clover in the field?

First I got 7... then I got 13... I was confused but I went with 13 because I subtracted 25 by the number of white squares. There were around 12 white squares so I went with 13?

Reply 32

I got 7...
It was the next part that really got me though...

Reply 33

tayshufflebotham

Original post by StudyScience98

I got 7...
It was the next part that really got me though...

I got 7 too, what about the percentage?

Reply 34

Q1: Phloem & Xylem
b) Oxygen

Q2: 8.6
a)i) Hydrochloric acid
b)i) X

I remember writing these for the first few questions

Reply 35

bradok

I made so many stupid mistakes throughout it!

On the quadrat question I forgot to only count half squares and ended up with around 14. Hopefully, they will carry on my answer and I'll still receive marks for my percentage.

I didn't even know what was going on at the last two pages.

Reply 36