You have sampled a population in which you know that the percentage of the homozygous recessive genotype (aa) is 36%. The frequency of the “aa” genotype is
You have sampled a population in which you know that the percentage of the homozygous recessive genotype (aa) is 36%. The frequency of the “aa” genotype is .
Using this information, you can then determine that the frequency of the dominant allele is and the recessive allele is .
Based on this, the expected number of homozygous dominant individuals would be , of heterozygous individuals would be . and of homozygous recessive individuals would be .
You then go out and genotype 300 individuals from the population at random. You find that 49 are homozygous dominant, 142 are heterozygous, and 109 are homozygous recessive. Is this population in Hardy-Weinberg Equilibrium? Fill in the blank with either yes or no:
Fill in the blanks below to answer the question. Please make all calculations to the third decimal place. Be sure to follow standard rounding practices. Failure to follow these instructions will result in your answer not being awarded full credit (Partial Credit possible)
Researchers are studying a dominant, genetically inherited disorder called “Examitis” (or “Exam” for short). Humans with Exam start crying whenever they have to do math on an assignment. An analysis of 500 students revealed that that the mutant allele that causes Exam occurs in 2 out of every 10 students. Given this information, if the equilibrium frequency went from 0.48 to 0.56, then the strength of selection against the Exam allele would go from to .
Imagine you are a scientist interesting in understanding the genetics of jumping distance in bullfrogs. You do a large, multi-generational breeding experiment and are able to estimate the variance components of jumping distance. You discover that each allele, on its own, increases the jumping distance by 0.3 m. You also discover that the interaction between genes for jumping distance increases the jumping distance by 0.4 m. You know from past research that the overall variance of jumping distance due to genetics is 0.8 and that variance due to the environment is 1.1. Given this information, the Broad Sense Heritability of bullfrog jumping distance is and the Narrow Sense Heritability of bullfrog jumping distance is .
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