02a mutations

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  • For example, human eye colour plays no role in survival.
  • Human hair colour is also a neutral mutation.
  • 02a mutations

    1. 1. Mutation for Variation
    2. 2. Mutation for Variation All organisms are different, even those of the same species. This is due to genetic variation.
    3. 3. Mutation for Variation Genetic variation means that genes have different alleles. Different alleles can by made by mutation.
    4. 4. Mutation for Variation Mutations may occur in somatic cells or germ cells. Germ cell mutations are passed along to progeny. GERM CELL Germ cells are sex cells, like the sperm and egg. SOMATIC CELL Somatic cells are non-sex cells, like skin or muscle cells.
    5. 5. Mutation for Variation These mutations may be 1) harmful 2) neutral   3) beneficial  to an organism's and its offspring's survival.
    6. 6. Mutation for Variation 1) If a harmful mutation is passed-down then the progeny is less likely to reproduce successfully. Female peacocks choose their mates by the colour of their plumage. This white peacock mutation greatly reduces the chances it will find a mate.
    7. 7. Mutation for Variation 1) This means the harmful mutation is also less likely to be passed along, dying-off with the mutated organism. If an animal is born with 3 legs in the wild, its chances of survival drop drastically.
    8. 8. Mutation for Variation 2) If a neutral mutation is passed-down to the progeny then its chances of survival and reproduction are unaffected.
    9. 9. Mutation for Variation 2) The neutral mutation will probably be passed down many generations in some organisms.
    10. 10. Mutation for Variation 3) If a beneficial mutation is passed-down then the progeny have a higher chance to survive and reproduce. The opposable thumb mutation had great advantages over other animals in that population.
    11. 11. Mutation for Variation 3) Future generations will also have this mutation and will also thrive, having many offspring and proliferating this mutation. This lady is resistant to HIV (the AIDS virus) and is more likely to survive and reproduce in a place where 1 in 4 people are infected with HIV.

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