For example, human eye colour plays no role in survival.
Human hair colour is also a neutral mutation.
11 u mutations
Mutation for Variation
Mutation for VariationAll organisms are different, even those of the samespecies. This is due to genetic variation.
Mutation for VariationGenetic variation within a species means that geneshave different alleles. Different alleles can by made bymutation.
Mutation for VariationMutations may occur in somatic cells or germ cells. Germcell mutations are passed along to progeny, creating anew population. GERM CELL Germ cells are sex cells, like the sperm and egg.
Mutation for VariationSomatic cell mutations will only change the individualthat has the mutation. SOMATIC CELL Somatic cells are non-sex cells, like skin or muscle cells.
Mutation for VariationThese mutations may be1) harmful 2) neutral 3) beneficial to an organisms and its offsprings survival.
Mutation for Variation1) If a harmful mutation is passed-down then theprogeny is less likely to reproduce successfully.Female peacocks choose their mates by the colour of their plumage. Thiswhite peacock mutation greatly reduces the chances it will find a mate.
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 inthe wild, its chances of survivaldrop drastically.
Mutation for Variation2) If a neutral mutation is passed-down to theprogeny then its chances of survival and reproductionare unaffected.
Mutation for Variation2) The neutral mutation will probably be passed downmany generations in some organisms.
Mutation for Variation3) If a beneficial mutation (adaptation) is passed-down then the progeny have a higher chance tosurvive and reproduce (selective advantage). The opposable thumb mutation had great advantages over other animals in that population.
Mutation for Variation3) Future generations will also have this mutation andwill also thrive, having many offspring andproliferating this mutation.This lady is resistant to HIV (the AIDS virus) and is more likely to surviveand reproduce in a place where 1 in 4 people are infected with HIV.
Think. Pair. Share.Overuse of antibiotics to kill bacteria leads to antibioticresistant strains of bacteria. Propose the way this happens.