5. Example 1
• Mendellian law of dominance
A -> Tall (Dominant)
a -> Dwarf (recessive)
Aa is …….
Aa X Aa
A
a X A
a
639 Tall and
281 dwarf
AA Aa Aa aa
Chi square requires that you have numeric
values
Chi square should not be calculated if the
expected value is less than 5