Below 1ozygous parents AABB xa from P to F Meme Note how the

Last updated: 2/7/2023

Below 1ozygous parents AABB xa from P to F Meme Note how the P individuals can each only produce one type of gam te thus all F offs are heterozygous for both genes Each F heterozygote can make four different gametes 16 boxes on the right P F F F2 AB ab AaBb A a A AA Aa Example a Aa aa X A B A b a B a b B B Bb b Bb bb b BB Recall the FOIL method from algebra FOIL the A phenotype ratio with the B phenotype the dihybrid phenotype ratio of the A and B genes combined Express these as both a ratio and fractions 3 4 3 4 9 16 5 If there are 320 offspring in F from the cross above AB aB Ab ab AB AABB AaBB AABb AaBb aB AaBB aaBB AaBb aaBb Ab AABb AaBb AAbb Aabb ab AaBb aaBb Aabb aabb b How many do you predict are aabb a how many do you predict are heterozygotes for both traits phonotype and the b phenotype