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Molecular Genetics
Quick questions on Mutations and their consequences: H2 Biology Molecular Genetics
6short 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 are gene (point) mutations?Show answer
A gene mutation is a change in the base sequence of a gene. The main types are:
What is effects on the protein?Show answer
The effect depends on how the codons change.
What are chromosome mutations?Show answer
Larger-scale changes affect whole chromosomes or sections: deletion, duplication, inversion or translocation of a segment, or a change in chromosome number (such as non-disjunction producing an extra chromosome).
What is q1?Show answer
Name the type of point mutation that introduces a premature stop codon. [1 mark]
What is q2?Show answer
Explain why an insertion of three bases is usually less harmful than an insertion of one base. [2 marks]
What is q3?Show answer
State one environmental factor that increases the rate of mutation and explain how it acts. [2 marks]
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