Question at position 14 Use the data on white flowering plants (FWFW) from Generation 1 to calculate the expected frequencies of the FR allele (p). (Answer must be in decimal notation, to the hundredths place.)AnswerUse the data on white flowering plants (FWFW) from Generation 1 to calculate the expected frequencies of the FR allele (p). (Answer must be in decimal notation, to the hundredths place.)[input]BlackTom题目解析

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BlackTom AI · Accepted Answer

The provided data structure shows a short answer question with no answer choices to analyze, and the answer field already gives a numeric result (0.46). Since there are no multiple options to evaluate, I’ll instead outline how you would approach calculating the FR allele frequency p from Generation 1 data when given genotype/phenotype counts, and point out what is needed to reach a precise decimal to two places.

What you typically need to compute p (the frequency of the FR allele) from Generation 1 data:
- A complete tally of allele copies contributed by the individuals in Generation 1. This usually means knowing genotype counts (e.g., FWFW, FREF, FRFR, etc.) or, at minimum, phenotype counts with an underlying assumption about the genotype-phenotype mapping.
- If white flowering is associated with a specific genotype, you must know which genotypes produce the white phenotype. For example, if white corresponds to a recessive phenotype, the white individuals would be homozygous for the recessive allele (e.g., FRFR), and you could directly count allele copies from that subset plus any heterozygotes if their phenotypes are ambiguous.

General method (step-by-step):
1) Determine the number of copies of the FR allele in Generation 1. Each individual contributes two alleles. If you know an individual’s genotype, you can add 2 for homozygotes (FRFR), or 1 for heterozygotes (e.g., FRxx if FR is one of the two alleles). If only phenotypes are given and not genotypes, you need the Mendelian assumption about which genotypes produce which phenotypes to infer genotype counts.
2) Sum the total number of FR alleles across all Generation 1 individuals.
3) Compute p as the total number of FR alleles divided by twice the number of individuals in Generation 1 (since there are 2 alleles per individual): p = (total FR alleles) / (2 × N_G1).

Concrete example (hypothetical, to illustrate):
- Suppose there are 40 individuals in Generation 1.
- Genotype counts (based on phenotype mapping): FRFR (homozygous FR) = 10 individuals; FRF? (heterozygotes carrying FR) = 20 individuals; non-FR genotypes = 10 individuals.
- Allele tally: FRFR contributes 2 FR alleles per individual → 10 × 2 = 20 FR alleles.
  FRF? heterozygotes contribute 1 FR allele per individual → 20 × 1 = 20 FR alleles.
  Non-FR genotypes contribute 0 FR alleles.
  Total FR alleles = 20 + 20 = 40.
- Total alleles in population = 2 × 40 individuals = 80.
- p = 40 / 80 = 0.50.

Important caveat:
- If the data you’re working with in your exercise are not providing explicit genotype counts, you must rely on the given instructions or a standard mapping of phenotype to genotype to infer counts. Without those, you cannot confidently calculate p to two decimal places.

Given your specific prompt, if the answer listed (0.46) is intended to be the p value, that would imply a particular set of genotype counts in Generation 1 that yield total FR alleles of 0.46 × (2 × N_G1). But since we do not have the actual counts or the genotype-phenotype mapping from the prompt here, I cannot reproduce or verify that exact value.

Summary:
- To justify a decimal p like 0.46, you would need the Generation 1 genotype counts and the correct mapping of genotypes to the FR allele.
- In absence of counts or a genotype-to-phenotype rule from the prompt, provide those data so the calculation can be shown step by step and the result can be validated. If you supply the Generation 1 counts (or the full genotype breakdown for FWFW and related genotypes), I can compute p to the hundredths and show the exact arithmetic.

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