X for purple flowers
locus for
flower color Y
homologous
pair of Z
X for white flowers
The diagram shows structures that help determine the color of a certain flower. Which list best
identifies the structures labeled X, Y, and Z in the diagram?
A. X: allele
Y: flower color gene
Z: chromosome
B. X: gene
Y: flower color allele
Z: chromosome
C. X: allele
Y: flower color chromosome
Z: strand of DNA
D. X: gene
Y: flower color allele
Z: strand of DNA