AQA GCSE COMBINED SCIENCE: TRILOGY Higher Tier Biology Paper
(8464/B/2H) Combined Question Paper and Mark Scheme
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
H
GCSE
COMBINED SCIENCE: TRILOGY
Higher Tier
Biology Paper 2H
Materials For Examiner’s Use
For this paper you must have:
• a ruler Question Mark
• a scientific calculator. 1
2
Instructions
• Use black ink or black ball-point pen. 3
• Pencil should only be used for drawing. 4
• Fill in the boxes at the top of this page.
5
• Answer all questions in the spaces provided.
• If you need extra space for your answer(s), use the lined pages at the end of 6
this book. Write the question number against your answer(s). TOTAL
• Do all rough work in this book. Cross through any work you do not want to be
marked.
• In all calculations, show clearly how you work out your answer.
Information
• The maximum mark for this paper is 70.
• The marks for questions are shown in brackets.
• You are expected to use a calculator where appropriate.
• You are reminded of the need for good English and clear presentation in your answers.
, 3
Do not write
outside the
0 1 This question is about genetics. box
The fur colour of rabbits is controlled by two alleles.
0 1 . 1 Draw one line from each term to the meaning of the term relating to genetics
in rabbits.
[3 marks]
Question 1 continues on the next page
Turn over ►
IB/M/Jun25/8464/B/2H
, 4
Do not write
outside the
0 1 . 2 In rabbits: box
• the allele for brown fur (B) is dominant
• the allele for white fur (b) is recessive.
A rabbit with the alleles Bb and a rabbit with the alleles bb breed together.
Determine the probability that one of the offspring will have white fur.
You should:
• complete the Punnett square diagram
• identify any offspring that will have white fur.
[5 marks]
Probability =
IB/M/Jun25/8464/B/2H
, 5
Do not write
outside the
0 1 . 3 A male rabbit is heterozygous for fur colour. box
The rabbit’s body cells have the genotype Bb.
One of the sperm cells from the rabbit has the allele b.
Explain why the alleles in the rabbit’s body cells and the allele in the sperm cell
are different.
[2 marks]
Question 1 continues on the next page
Turn over ►
IB/M/Jun25/8464/B/2H
(8464/B/2H) Combined Question Paper and Mark Scheme
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
H
GCSE
COMBINED SCIENCE: TRILOGY
Higher Tier
Biology Paper 2H
Materials For Examiner’s Use
For this paper you must have:
• a ruler Question Mark
• a scientific calculator. 1
2
Instructions
• Use black ink or black ball-point pen. 3
• Pencil should only be used for drawing. 4
• Fill in the boxes at the top of this page.
5
• Answer all questions in the spaces provided.
• If you need extra space for your answer(s), use the lined pages at the end of 6
this book. Write the question number against your answer(s). TOTAL
• Do all rough work in this book. Cross through any work you do not want to be
marked.
• In all calculations, show clearly how you work out your answer.
Information
• The maximum mark for this paper is 70.
• The marks for questions are shown in brackets.
• You are expected to use a calculator where appropriate.
• You are reminded of the need for good English and clear presentation in your answers.
, 3
Do not write
outside the
0 1 This question is about genetics. box
The fur colour of rabbits is controlled by two alleles.
0 1 . 1 Draw one line from each term to the meaning of the term relating to genetics
in rabbits.
[3 marks]
Question 1 continues on the next page
Turn over ►
IB/M/Jun25/8464/B/2H
, 4
Do not write
outside the
0 1 . 2 In rabbits: box
• the allele for brown fur (B) is dominant
• the allele for white fur (b) is recessive.
A rabbit with the alleles Bb and a rabbit with the alleles bb breed together.
Determine the probability that one of the offspring will have white fur.
You should:
• complete the Punnett square diagram
• identify any offspring that will have white fur.
[5 marks]
Probability =
IB/M/Jun25/8464/B/2H
, 5
Do not write
outside the
0 1 . 3 A male rabbit is heterozygous for fur colour. box
The rabbit’s body cells have the genotype Bb.
One of the sperm cells from the rabbit has the allele b.
Explain why the alleles in the rabbit’s body cells and the allele in the sperm cell
are different.
[2 marks]
Question 1 continues on the next page
Turn over ►
IB/M/Jun25/8464/B/2H
