1
QuizMultiple Choice
Unit Test
Question 1 of 15 • Biology
A pedigree chart for a genetic trait is shown below. The trait of interest is carried by a dominant allele, and individuals expressing the trait are represented by the shaded shapes.How do you know that individual 1 is heterozygous for the trait?
Answer
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.