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SingaporeBiologyQuick questions

Reproduction, Genetics and Inheritance

Quick questions on Monohybrid inheritance and variation explained: O-Level Biology

5short 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 setting out a genetic cross?
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To predict the offspring of a cross, set out a clear genetic diagram:
What is variation?
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Offspring vary, and variation comes in two kinds:
What is q1?
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Define the term dominant allele. [1 mark]
What is q2?
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A cross between two heterozygous plants (Tt×TtTt \times Tt) is made. State the expected phenotype ratio. [2 marks]
What is q3?
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State whether blood group is an example of continuous or discontinuous variation, and explain why. [2 marks]

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