• 1. Law of Independent Assortment Mendel's 2nd Law “Inheritance Law” formulated after his 1st principle (law of segregation) - alleles for a trait separate when gametes are formed - allele pairs randomly unite at fertilization
• 2. What would happen if he studied plants that differed in 2 traits? Would they be transmitted to the offspring together, or Would one trait be transmitted independently of the other? Performed dihybrid crosses (a cross b/w 2 parents that differ by 2 pairs of alleles; ex. GGYY x ggyy) in plants that were true-breeding for 2 traits Hybridization experiments done b/w 1856-1863 using garden peas (Pisum sativum)
• 3. First experiment: cross pollinated pure bred round, yellow seed producing pea with pure bred wrinkled, round seed producing pea. Cross pollinated a plant w/ green pod colour (G) & yellow seed colour (Y) and a plant w/ yellow pod colour (g) & green seed colour (y) Dominant: green pod colour (GG) yellow seed colour (YY) Recessive: yellow pod colour (gg) green seed colour (yy) Resulting offspring/F1 generation: all heterozygous for green pod colour and yellow seeds (GgYy)