DIHYBRID INHERITANCE

• WHAT IS DIHYBRID INHERITANCE?

  how two characteristics, determined by two different genes on different chromosomes are inherited
• WHO STUDIED DIHYBRID INHERITANCE?

  Gregor Mendel
• DIHYBRID INHERITANCE MENDEL LOOKED FOR?

  G = green

  g = yellow

  R = round

  r = wrinkled
• F0 CROSS FOR MENDEL'S PEAS?

  homozygous dominant x homozygous recessive = heterozygous

  -> 100%

  GGRR x ggrr = GgRr

  -> F1 = green and round
• F1 CROSS FOR MENDEL'S PEAS?

  heterozygous x heterozygous = 9 (DD) : 3 (DR) : 3 (RD) : 1 (RR)

  -> GgRr x GgRr
• WHAT DID DIHYBRID INHERITANCE LEAD TO?

  formulation of law of independent assortment

  -> each member of a pair of alleles may combine randomly with either of another pair