How do you know that individual 1 is heterozygous for the trait?
A. The shading of the square indicates that the individual is heterozygous.
B. The shaded square is shown to the left of the unshaded circle.
C. Individual 2 is homozygous recessive, and individuals 5 and 8 did not inherit the dominant trait.
D. Individual 2 is homozygous recessive, and individuals 3 and 7 did inherit the dominant trait.