8th Grade Science- Evolution

8th Grade Science- Evolution

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  • Do you see this? This is your DNA. DNA contains your genetic information.
  • For every gene, you get two alleles- one from your dad and one from your mom!
  • Maybe that is why I look like my parents...
  • This is punnett square. Since your get your alleles from your parents, its hard to track what their offspring can look like. A punnett square helps track all the possibilities for a genotype.
  • PP
  • Pp
  • PP
  • Pp
  • A genotype is made from your two alleles, like Gg or GG.
  • A phenotype is your physical appearance like  brown hair or round eyes.
  • Heterozygous traits are traits that have two different allelesEx: Gg
  • Homozygous traits are traits that have two same alleles.Ex: GG or gg
  • When two different dominant alleles shown up, it is called co dominance. Both genes are expressed.
  • A common misconception about genes: the offspring would take only one phenotype from their parents.
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