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"Multiple choice question. Which of the following best describes alleles? Alleles allow DNA to be wrapped and organized into chromosomes. Alleles are the basic unit of inheritance for cells. Alleles are variations of genes and include examples such as eye color, height, and ability to digest lactose. Alleles are specific locations on genes that code for proteins and other protein products. "
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Step 1
: Understand the question and the given options.

Alleles are alternatives forms of genes that arise by mutation and are located at specific positions on chromosomes. They contribute to the organism's phenotype, which is the physical expression of its genes. Let's examine the given options: A) Alleles allow DNA to be wrapped and organized into chromosomes. This statement is incorrect because while histones and other proteins facilitate DNA wrapping, alleles do not play a direct role in this process. B) Alleles are the basic unit of inheritance for cells. This statement is also incorrect because genes are the basic units of inheritance. Alleles are variations of genes. C) Alleles are variations of genes and include examples such as eye color, height, and ability to digest lactose. This statement is correct. Alleles are responsible for the variations in traits we observe among individuals within a species. Examples include eye color, height, and ability to digest lactose, among others. D) Alleles are specific locations on genes that code for proteins and other protein products. This statement is incorrect because alleles are variations of genes, not specific locations on genes.

Step 2
: Select the correct answer.

Final Answer

The best description of alleles is option C: Alleles are variations of genes and include examples such as eye color, height, and ability to digest lactose.

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