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Mutations

Mutations. Mutations: change in the genetic material …. Now and again cells make mistakes in copying DNA. 2 types of Mutations. Gene mutations Chromosomal mutations. Gene Mutations. Occur on a single gene TAC GCA TGG AAT Code is read in 3 base codons Thefatcatandratran- say?.

daniel-sanders
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Mutations

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  1. Mutations • Mutations: change in the genetic material • …. Now and again cells make mistakes in copying DNA

  2. 2 types of Mutations • Gene mutations • Chromosomal mutations

  3. Gene Mutations • Occur on a single gene • TAC GCA TGG AAT • Code is read in 3 base codons • Thefatcatandratran- say?

  4. 3 types of gene mutations • Point Mutations occur at 1 spot • TAC GCA TGG AAT – original • Substitution? • Insertion? • Deletion ?

  5. TAC GCA TGG AAT – original • Substitution • TAC GGA TGG AAT • Insertion • TAC GGC ATG GAA T • Deletion • TAC GAT GGA AT

  6. Which are the 2 worst kinds of gene mutations? Why? • THE FAT CAT RAN – original • Substitution • THH FAT CAT RAN • Insertion • THE FAA TCA TRA N • Deletion • HEF ATC ATR AN

  7. Which are the 2 worst kinds of gene mutations? Why? • Changes message which changes the amino acid that is made- wrong protein made …

  8. Chromosomal Mutations • Changes in the … • Number of chromosomes • Down’s Syndrome • Or structure of chromosome • Deletion • Duplication • Inversion • Translocation

  9. Deletion- 1 section is deleted • Duplication- 1 section is doubled • Inversion- 1 section is reversed • Translocation -part of one chromosome breaks off and attaches to another.

  10. Mutations are good, bad or neutral • Neutral • Bad: cause dramatic changes in protein structure… body cannot function properly • Good.. Can create variability in species, can be beneficial, if environment • Ex- AIDS resistant gene • Polyploidy (extra chromosomes) • Banana and citrus fruits are larger and stronger

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