2025 AQA GCSE COMBINED SCIENCE: TRILOGY 8464/B/2H
Higher Tier Biology Paper 2H
Question Paper with Marking Scheme Attached
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
GCSE
COMBINED SCIENCE: TRILOGY
Higher Tier
H
Biology Paper 2H
Monday 9 June 2025 Morning Time allowed: 1 hour 15 minutes
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.
, 2
Do not write
outside the
There are no questions printed on this page box
DO NOT WRITE ON THIS PAGE
ANSWER IN THE SPACES PROVIDED
IB/M/Jun25/8464/B/2H
, 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
Higher Tier Biology Paper 2H
Question Paper with Marking Scheme Attached
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
GCSE
COMBINED SCIENCE: TRILOGY
Higher Tier
H
Biology Paper 2H
Monday 9 June 2025 Morning Time allowed: 1 hour 15 minutes
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.
, 2
Do not write
outside the
There are no questions printed on this page box
DO NOT WRITE ON THIS PAGE
ANSWER IN THE SPACES PROVIDED
IB/M/Jun25/8464/B/2H
, 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
