Use the Figure and the Following Description to Answer the Question

question 20

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 a heterozygous genotype?

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

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Definitions:

Charles W. Chesnutt

An African American author and political activist, known for his novels and short stories exploring complex racial identities in the post-Civil War South.

Frances Ellen Watkins Harper

A 19th-century African American abolitionist, poet, and author, known for her writings on social issues, including women's rights, slavery, and racial justice.

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