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:

Research Instruments

Tools and methods used for collecting, measuring, and analyzing data in research studies.

Quantitative Social Research

A research method focusing on the collection and analysis of numerical data to understand patterns in social phenomena.

Independent Variables

Variables in an experimental setting that are manipulated or changed to observe their effects on dependent variables.

Dependent Variables

The variables in scientific research that are measured as outcomes, expected to change as a result of independent variables' manipulation.