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1. In a certain population of African people, 9% of the population is born with sickle cell anemia. This is a recessive disease. What % of the population is:

Homozygous Dominant?

Heterozygous?

2. The frequency of the allele "z" in a population is 65%. Find the % of the following:

Homozygous recessive?

Heterozygous?

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Hubert Koch
Hubert KochLv2
28 Sep 2019
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Related questions

Part A

In humans, individuals may or may not have a widow’s peak. This trait is controlled by genes at a single locus, with the allele for having a widow’s peak dominant to the allele for not having one. A population of humans is sampled; 59 have a widow’s peak and 44 do not. 25 of the people with a widow’s peak are homozygous dominant. What are the frequencies of the dominant and recessive alleles observed in this sample?

p = _____

q = _____

Part B

In a species of corn, individuals have either narrow or wide corn cobs. This trait is controlled by genes at a single locus, with the narrow cob allele dominant to the wide cob allele. A farmer counts 74 narrow cob and 113 wide cob plants in a field. Of the narrow cob plants, 28 are homozygous dominant. What are the frequencies of the dominant and recessive alleles observed in this sample?

p = _____

q = _____

Part C

In a population of peas, the frequency of the dominant allele for a purple flower is 0.61 and the frequency of the recessive allele for a white flower is 0.39. What would the genotypic frequencies be if the population is in equilibrium?

_____ = Frequency of homozygous dominant individuals

_____ = Frequency of heterozygous individuals

_____ = Frequency of homozygous recessive individuals

How many individuals would you expect of each genotype in a population of 500 peas?

_____ = Number of homozygous dominant individuals

_____ = Number of heterozygous individuals

_____ = Number of homozygous recessive individuals

Part D

In mice, a mahogany coat color allele is dominant over the tan coat color allele. In a population of mice, the frequency of the allele for mahogany coat color is 0.19 and the frequency of the allele for tan coat color is 0.81. What would the genotypic frequencies be if the population is in equilibrium?

_____ = Frequency of homozygous dominant individuals

_____ = Frequency of heterozygous individuals

_____ = Frequency of homozygous recessive individuals

How many individuals would you expect of each genotype in a population of 100 mice?

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Part E

In humans, the free earlobe allele is dominant over the attached ear lobe allele. In a population of humans, the frequency of the allele for free earlobes is 0.42 and the frequency of the allele for attached earlobes is 0.58. What would the genotypic frequencies be if the population is in equilibrium?

_____ = Frequency of homozygous dominant individuals

_____ = Frequency of heterozygous individuals

_____ = Frequency of homozygous recessive individuals

How many individuals would you expect of each genotype in a population of 25 humans?

_____ = Number of homozygous dominant individuals

_____ = Number of heterozygous individuals

_____ = Number of homozygous recessive individuals

In a population of Mice fur color is determined by one gene witha dominant and a recessive allele. Black mice are homozygousdominant, brown mice are heterozygous and white mice are homozygousrecessive. In this population there are 340 black mice, 430 brownmice and 330 white mice.

What is the frequency of the dominant allele? b. What is thefrequency of the recessive allele? c. What is the observedfrequency of the homozygous dominant genotype in this population?d. What is the observed frequency of the homozygous recessivegenotype in this population? e. What is the observed frequency ofthe heterozygous genotype in this population? f. What is theexpected frequency of the homozygous dominant genotype in thispopulation? g. What is the expected frequency of the homozygousrecessive genotype in this population? h. What is the expectedfrequency of the heterozygous genotype in this population

Sickle Cell Anemia is caused by having two copies of therecessive h allele. The dominant allele H producesnormal-shaped red blood cells. You are an Evolutionary Geneticiststudying Sickle cell Anemia in a remote village in the Congo regionof Africa. You sample all of the people living in the village andthere are 200 people.

You determine that 80 people have full Sickle Cell Anemia. Usingwhat you know of the Hardy-Weinberg Equilibrium Theory, andassuming this population is in Hardy-Weinberg Equilibrium, answerthe following questions.

1. What is the observed frequency of the (hh) genotype in thispopulation? (show all work)

2. What is the predicted frequency of the sickle cell allele (h)in this population? (show all work)

3. What is the predicted frequency of the homozygous genotype(HH) in this population? (show all work)

4. What is the predicted frequency of the heterozygous genotypein this population? (show all work)

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