Use the Figure and the Following Description to Answer the Question

question 24

Multiple Choice

Use the figure and the following description to answer the question.
In a particular plant, leaf color is controlled by gene locus D. Plants with at least one allele D have dark green leaves, and plants with the homozygous recessive dd genotype have light green leaves. A true-breeding, dark-leaved plant is crossed with a light-leaved one, and the F₁ offspring is allowed to self-pollinate. The predicted outcome of the F₂ 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 leaves?

• A) 1 only
• B) 2 and 3
• C) 4 only
• D) 1, 2, and 3

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Definitions:

Erythr/o

A prefix used in medical terms to denote a relation to red or red blood cells.

Hemat/o

A prefix relating to blood.

Septicemia

A serious bloodstream infection that can lead to sepsis, a potentially life-threatening condition.

Hemostasis

The process by which bleeding is stopped via blood clotting after a blood vessel injury.