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WalesBiologyQuick questions
Unit 4: Variation, Inheritance and Applications
Quick questions on Inheritance and variation - WJEC A-Level Biology
3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is q1?Show answer
State the expected phenotype ratio from crossing two heterozygotes for a single gene. [1 mark]
What is q2?Show answer
Explain why colour blindness is more common in males than females. [2 marks]
What is q3?Show answer
A dihybrid cross produces offspring. Calculate how many are expected to show both recessive traits. [2 marks]
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