What is the probability of flipping a coin twice and getting two heads? 
 a) 1
 b) 1/2
 c) 1/4 
 d) 3/4
 A Punnett square is used to determine the: 
 a) probable outcome of a cross
 b) Actual outcome of a cross 
 c) Result of incomplete dominance 
 d) result of meiosis 
 Help plz