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Application of an insecticide to control mosquito populations in malaria infested areas quickly resulted in a dominant mutation, R, resulting in insecticide resistance. However, the mutation also reduces the fertility of RR homozygotes. The fitness of different genotypes in areas where the insecticide is in use, are as follows:
rr (susceptible) 0.35Rr (resistant) 1.0RR (resistant) 0.85
What is the equilibrium frequency of the R allele in the population? Using the fitness values in the previous problem, and a starting frequency of 1% for the R allele, what is the expected frequency of the R allele after one generation in an environment where the insecticide is applied?
In turtles, brown shells and the red legs are most prevalent forms of the traits. Occasionally, green shells and yellow legs are examined.
Explain three things that a paleontologist must do to plan a fossil hunting expedition so that he is likely to find evidence to reply a specific scientific question.
Two indpendently assorted genes control the color and taste of blueberries. Expression of the dominant allele B results in blue color while expression of the recessive allele b results in white color.
For which of the hydrogen atoms in these two structures will it be possible to infer the hydrogen positions, so that it is unnecessary to measure them?
A young mother is encouraging her son to try another bite of a disliked food. The child is quietly whining, but when the mother spreads the food around to cool it, the child becomes hysterical. Why did child become so upset? Recognize the cognitive s..
Discuss why is the skin on worms, the gills in fish, and the lungs in humans good epithelial surfaces for respiration. Be specific.
Wooly-hair is a rare trait found in people of Scandinavian descent in which the hair resembles the wool of a sheep. A woman with wooly hair who has a mother with straight hair moves to an island inhabited by people who are not of Scandinavian desc..
What's the possible use of enzyme's electrostatic potential.
Compare and contrast mutation rate and mutation frequency. Describe the implications for organisms that have long life spans (e.g., humans) and short life spans (e.g., mice). Spontaneous mutation rates in humans are generally higher than in E. col..
you count 13 bacterial cells in the smallest square of a hemocytometer culture was diluted 1:5 prior to placing a sample on the hemocytometer. what is the density of the original undiluted culture?
You have 0.05 mL of an undiluted culture at a concentration of 3.6 x 10^6 CFU/mL. You then add 4.95 mL sterile diluent. What is the dilution, and what is the final concentration of cells?
In a particular type of melon, orange fruit is dominant over green fruit and round shape is dominant to oval. If a plant that was heterozygous for both traits were crossed with a plant that was homozygous recessive for both traits, what proportion..
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