43. The relative proportion of each allele within a population is called _____________ frequency

Question

BlackTom AI · Accepted Answer

Allele frequency (also called gene frequency) is the correct term because it quantifies the relative proportion of a specific allele among all alleles for a gene in a population.

1. Relevant concepts
- Allele: a variant form of a gene. 
- Allele frequency: proportion of all copies of a gene in a population that are a particular allele.
- Genotype frequency: proportion of individuals with a specific genotype (e.g., AA, Aa, aa).
- Hardy–Weinberg relation: for a locus with two alleles p + q = 1, where p and q are allele frequencies.

2. Step-by-step reasoning
- The question asks for the term describing the relative proportion of each allele within a population. That is the definition of allele frequency.
- Genotype frequency refers to proportions of genotypes, not alleles. Genetic frequency is a vague term and not standard; sometimes people incorrectly use it to mean allele frequency, but the precise term is allele frequency. Epigenetic refers to heritable changes in gene expression without DNA sequence changes—irrelevant to proportions of alleles.

3. Example calculation (intermediate steps)
- Suppose a population of 100 diploid individuals with genotype counts: AA = 25, Aa = 50, aa = 25.
- Total number of alleles = 100 individuals × 2 = 200 alleles.
- Number of A alleles = (AA × 2) + (Aa × 1) = 25×2 + 50×1 = 50 + 50 = 100.
- Allele frequency of A = 100 / 200 = 0.50 (50%).
- Genotype frequency of AA = 25 / 100 = 0.25 (25%) — different quantity.

4. Why "allele" is correct
- The definition matches exactly: relative proportion of each allele = allele frequency (often shortened to “allele”).

5. Why other options are incorrect
- Genotype: measures proportions of genotype combinations, not allele proportions.
- Genetic: ambiguous/nonstandard; not the precise term used in population genetics.
- Epigenetic: concerns non-sequence-based regulatory changes, not allele proportions.

Conclusion: The correct answer is "allele," which matches the provided answer.

43. The relative proportion of each allele within a population is called _____________ frequency单项选择题

类似问题

Question at position 32 In a population of 100 squirrels, 16 are red (rr), 36 are gray (RR), and 48 are brown (Rr). The relative frequency of the r allele isimpossible to determine from these data0.160.400.64Clear my selection

In a population of flowering plants, there are two alleles for flower color. One is dominant and is represented A, one is recessive and is represented a. The allele frequency of A is 0.7. What is the allele frequency of a?

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单