Use the figure
and the following description to answer the questions
Plants with at least one allele D have dark green leaves,
and plants with the homozygous recessive dd genotype
have light green leaves.
A homozygous dark-leaved plant is crossed with a plant
with light-green leaves, and the F
offspring is allowed to
The predicted outcome of the F
is diagrammed in the
Punnett square shown in the figure, where 1, 2, 3, and 4
represent the genotypes corresponding to each box
within the square.
Which of the boxes marked 1-4 correspond to plants
with dark green leaves?