Read the statements. If Sally has earlobes that are attached to the side of her head. Sally has two _[blank 1]_ that cause her to have attached earlobes. Sally has obtained these from her _[blank 2]_.

Which option correctly completes these statements?

a. blank 1: traits
blank 2: father

b. blank 1: alleles
blank 2: parents

c. blank 1: genes
blank 2: father

d. blank 1: traits
blank 2: parents