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OXFORD CAMBRIDGE AND RSA GCE Biology B H422/02: Scientific literacy in biology A Level QUESTION PAPER AND MARKING SCHEME MERGED 2024 $7.79   Add to cart

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OXFORD CAMBRIDGE AND RSA GCE Biology B H422/02: Scientific literacy in biology A Level QUESTION PAPER AND MARKING SCHEME MERGED 2024

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OXFORD CAMBRIDGE AND RSA GCE Biology B H422/02: Scientific literacy in biology A Level QUESTION PAPER AND MARKING SCHEME MERGED 2024

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  • October 10, 2024
  • 76
  • 2024/2025
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DistinctionGuruHuan1
GCEBiology
BH422/02: Scientific
literacy in biologyA
Level




Oxford
cambridge
and rsa
2024


OCR 2024

, Oxford Cambridge and RSA

Friday 14 June 2024 – Morning
A Level Biology B (Advancing Biology)
H422/02 Scientific literacy in biology
Time allowed: 2 hours 15 minutes

You must have:
• a clean copy of the Advance Notice Article (inside
this document)
You can use:
• a scientific or graphical calculator
• a ruler (cm/mm)


* H 4 2 2 0 2 *




Please write clearly in black ink. Do not write in the barcodes.

Centre number Candidate number


First name(s)

Last name



INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use the lined
pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks might begiven
for using a correct method, even if your answer is wrong.

INFORMATION
• The total mark for this paper is 100.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 28 pages.

ADVICE
• Read each question carefully before you start your answer.




OCR is an exempt Charity
Turn over

, 2
1 This question is based on the Advance Notice Article ‘The Eye’.

(a) A person’s genotype determines their eye colour phenotype.

(i) Define the term genotype.

..........................................................................................................................................................

..........................................................................................................................................................

..................................................................................................................................................... [1]

(ii) Define the term phenotype.

..........................................................................................................................................................

..........................................................................................................................................................

..........................................................................................................................................................

..........................................................................................................................................................

..................................................................................................................................................... [2]

(b) Fig. 1.1 shows the inheritance of eye colour in one family.

Squares represent males and circles represent females.

Filled shapes represent individuals with blue eyes and unfilled shapes represent individuals withbrown
eyes.

Fig. 1.1


= male with blue eyes
1 2
= male with brown eyes

= female with blue eyes

3 4 5 = female with brown eyes




6 7 8 9 10




© OCR 2024

, 3
(i) Explain one piece of evidence from Fig. 1.1 that indicates the allele for blue eyes is recessive.

..........................................................................................................................................................

..........................................................................................................................................................

..........................................................................................................................................................

..........................................................................................................................................................

..................................................................................................................................................... [2]

(ii) Explain one piece of evidence from Fig. 1.1 that indicates the allele for blue eyes is located onan
autosome and not the X chromosome.

..........................................................................................................................................................

..........................................................................................................................................................

..........................................................................................................................................................

..........................................................................................................................................................

..................................................................................................................................................... [2]

(iii) The chi squared (χ2) test is used to determine whether the results of genetic crosses are
statistically significant.

Explain why the χ2 test is appropriate for use in genetic crosses.

..........................................................................................................................................................

..........................................................................................................................................................

..........................................................................................................................................................

..........................................................................................................................................................

..................................................................................................................................................... [2]

(iv) Suggest why the χ2 test would not be appropriate for analysing the data in Fig. 1.1.

..........................................................................................................................................................

..........................................................................................................................................................

..................................................................................................................................................... [1]




© OCR 2024 Turn over

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