OCR A Level Biology Module 6
regulatory gene - a gene that codes for a transcription factor, so controls the expression of structural genes structural gene - gene that codes for polypeptide mutation - a random change in the sequence of bases in an individual gene, or in the structure of the chromosome (which changes the sequence of genes on the chromosome) examples of mutagenic agents - x-rays, UV light (physical), nitrous acid (chemical) & some viruses (biological agents) what can chromosomal mutations also do? - alter the chromosome no of the individual what can cause chromosomal mutations? - - deletion - inversion - translocatio
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regulatory gene a gene that codes for a transcription factor
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so controls the expression of structural genes structural gene gene that codes for polypeptide mutation a random change in the sequ