Mendel and Inheritance

• The law of independent assortment states that genes found on separate chromosomes are inherited independently.

  The inheritance of a gene for one trait does not influence the in gene received for another trait.
• The law of segregation states that pairs of alleles are segregated during meiosis

  
  

  One allele from the pair is passed down to the offspring
• Non-Mendelian inheritance patterns include...

  Incomplete dominance. co-dominance, multiple allelism, and sex-linkage
• Non-disjunction occurs when chromosomes fail to separate during anaphase 1 and/or anaphase 2 of meiosis
• Incomplete dominance occurs when offspring present a "blend" of the parent phenotypes.

  Neither alleles are FULLY dominant
• What is the Meddelian ratio in a Di-hybrid cross?

  9:3:3:1
• What is the Medelian ratio for a monohybrid cross?

  3:1