Multiple Choice
Which two structures of a frog would most likely have the same chromosome number?
12
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12. Meiosis
Genes & Alleles
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Which of the following best describes an allele?
A
A sequence of amino acids that forms a protein
B
A structure that packages and organizes DNA within the nucleus
C
A type of cell division that produces gametes
D
A variant form of a gene at a specific locus on a chromosome
Verified step by step guidance1
Understand the term 'allele': An allele is a variant form of a gene that exists at a specific locus (position) on a chromosome. It is responsible for variations in traits, such as eye color or blood type.
Clarify why the correct answer is 'A variant form of a gene at a specific locus on a chromosome': Alleles are different versions of the same gene, and they can lead to different phenotypic expressions depending on whether they are dominant, recessive, or co-dominant.
Eliminate incorrect options: The option 'A sequence of amino acids that forms a protein' describes a polypeptide or protein, not an allele. Proteins are the products of gene expression, not the genes themselves.
Eliminate incorrect options: The option 'A structure that packages and organizes DNA within the nucleus' refers to chromatin or chromosomes, which are structural components of DNA organization, not alleles.
Eliminate incorrect options: The option 'A type of cell division that produces gametes' refers to meiosis, which is a process of cell division, not a description of an allele.
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