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Northern IrelandBiologyQuick questions
Genetics, Evolution and Ecosystems
Quick questions on Genetics and inheritance: monohybrid, dihybrid and sex linkage - CCEA 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
Two heterozygous tall pea plants (Tt) are crossed. State the expected phenotype ratio of the offspring. [1 mark]
What is q2?Show answer
Explain why haemophilia is more common in males than females. [2 marks]
What is q3?Show answer
A cross predicted a 3 to 1 ratio in 80 offspring. The observed numbers were 54 and 26. Calculate the chi-squared value.
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