If the nucleotide variability of a locus equals 0%, what is the gene variability and number of alleles at that locus?
a. gene variability = 0%; number of alleles = 0
b. gene variability = 0%; number of alleles = 1
c. gene variability = 0%; number of alleles = 2
d. gene variability > 0%; number of alleles = 2

검증된 단계별 안내

Understand the concept of nucleotide variability: It refers to the proportion of nucleotide sites that are different among individuals in a population. A 0% nucleotide variability means there is no variation at the nucleotide level at that locus.

Recognize the relationship between nucleotide variability and gene variability: Gene variability is the proportion of loci that are polymorphic (having more than one allele) in a population. If nucleotide variability is 0%, it implies that there is no polymorphism at the nucleotide level, leading to 0% gene variability.

Consider the number of alleles: If there is no nucleotide variability, it means all individuals have the same nucleotide sequence at that locus, indicating only one allele is present.

Evaluate the options: Based on the understanding that 0% nucleotide variability leads to 0% gene variability and only one allele, identify the correct option.

Select the correct answer: The option that states gene variability is 0% and the number of alleles is 1 is the correct choice.

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주요 개념

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Nucleotide Variability

Nucleotide variability refers to the degree of variation in the nucleotide sequences at a specific locus within a population. A 0% nucleotide variability indicates that there is no variation in the nucleotide sequences among individuals at that locus, meaning all individuals have identical sequences at that position.

Gene Variability

Gene variability measures the diversity of alleles present at a particular gene locus within a population. If nucleotide variability is 0%, it implies that there is no genetic variation at the nucleotide level, leading to 0% gene variability, as there are no different alleles present at that locus.

Number of Alleles

The number of alleles at a locus refers to the different versions of a gene that exist within a population. When nucleotide variability is 0%, it means there is only one allele present at that locus, as all individuals have the same nucleotide sequence, resulting in no genetic diversity at that position.