Keeping Track of Our Model

Driving Question: Why do some people who are related look similar and some do not?


  • Sexually reproducing organisms have two genes that determine each trait
  • A parent passes only one of his/her two genes for a trait to each offspring.
  • Random chance determines which of the two genes is passed to each offspring
  • Crossing over increases genetic diversity due to the exchange of genes between homologous chromosomes during the first part of meiosis.

Keeping Track of Our Model - Claims - Google Slides