Gene Mutations (OCR A-Level Biology A): Flashcards
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Gene mutation
Gene mutation
Change in DNA nucleotide sequence within a gene
Degenerate genetic code meaning
Degenerate genetic code meaning
Most amino acids encoded by >1 triplet codon
Amino acids with single codons
Amino acids with single codons
Methionine and tryptophan
Substitution mutation
Substitution mutation
One base replaced by different base
Silent mutation
Silent mutation
Base change but codon still codes for same amino acid
Missense mutation
Missense mutation
Substitution producing different amino acid
Frameshift cause
Frameshift cause
Insertion or deletion of bases shifting reading frame
Huntington's disease cause
Huntington's disease cause
CAG triplet repeated >36 times
Proto-oncogene function
Proto-oncogene function
Promotes controlled cell division
p53 protein function
p53 protein function
Halts cell division at G1 when DNA damage/errors occur