Calculate phenotype frequencies in 5th generation. Record in Lab Data 5 Calculate allele frequencies in 5th generation. Record in Lab Data 6 Calculate genotype frequencies and number of moths in 5th generation. Record in Lab Data
The Correct Answer and Explanation is:
To generate the correct answer, I need specific data from your lab results — such as the number of each phenotype (e.g., light-colored vs. dark-colored moths), the total population in the 5th generation, or the counts of different genotypes (e.g., homozygous dominant, heterozygous, homozygous recessive). However, I can guide you through how to calculate phenotype frequencies, allele frequencies, and genotype frequencies with an explanation below.
Step-by-Step Guide and Example:
Assume in the 5th generation you have:
- 200 moths total
- 120 dark-colored moths
- 80 light-colored moths
1. Phenotype Frequencies (Lab Data 5)
To calculate phenotype frequency:Frequency=Number of individuals with phenotypeTotal number of individuals\text{Frequency} = \frac{\text{Number of individuals with phenotype}}{\text{Total number of individuals}}Frequency=Total number of individualsNumber of individuals with phenotype
- Dark-colored:
120200=0.60\frac{120}{200} = 0.60200120=0.60 - Light-colored:
80200=0.40\frac{80}{200} = 0.4020080=0.40
2. Genotype Frequencies and Numbers (Lab Data 6)
Assume:
- Dark moths are dominant (A_), so could be AA or Aa
- Light moths are recessive (aa), so must be aa
Suppose:
- 50 are AA
- 70 are Aa
- 80 are aa
Genotype frequencies:
- AA: 50200=0.25\frac{50}{200} = 0.2520050=0.25
- Aa: 70200=0.35\frac{70}{200} = 0.3520070=0.35
- aa: 80200=0.40\frac{80}{200} = 0.4020080=0.40
Number of moths:
- AA = 50
- Aa = 70
- aa = 80
3. Allele Frequencies
Each moth has 2 alleles:
- Total alleles = 200×2=400200 \times 2 = 400200×2=400
Count A alleles:
- AA = 50 × 2 = 100 A alleles
- Aa = 70 × 1 = 70 A alleles
→ Total A = 170
Count a alleles:
- aa = 80 × 2 = 160 a alleles
- Aa = 70 × 1 = 70 a alleles
→ Total a = 230
Allele frequencies:
- A = 170400=0.425\frac{170}{400} = 0.425400170=0.425
- a = 230400=0.575\frac{230}{400} = 0.575400230=0.575
Conclusion:
In generation 5:
- Phenotype frequencies: 60% dark, 40% light
- Genotype frequencies: 25% AA, 35% Aa, 40% aa
- Allele frequencies: A = 42.5%, a = 57.5%
These frequencies show how natural selection or genetic drift may affect populations across generations
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