Demonstrate understanding of genetic variation and change

Achievement standard 91157

1.  Genetic variation and change involves the following concepts:
  • sources of variation within a gene pool
  • factors that cause changes to the allele frequency in a gene pool.
2.  Biological ideas and processes relating to sources of variation within a gene pool are selected from:
  • mutation as a source of new alleles, gametic and somatic mutation
  • independent assortment, segregation and crossing over during meiosis
  • monohybrid inheritance to show the effect of co-dominance, incomplete dominance, lethal alleles, and multiple alleles
  • dihybrid inheritance with complete dominance
  • the effect of crossing over and linked genes on dihybrid inheritance.
3.  Biological ideas and processes relating to factors affecting allele frequencies in a gene pool are selected from:

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