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Solve for the genetic structure of a population with 12homozygous recessive individuals (yy), 8homozygous dominant individuals (YY), and 4 heterozygous individuals (Yy).

Short Answer

Expert verified

Frequency of homozygous recessive individual =1224=0.50

Frequency of homozygous dominant individual = 824=0.33

Frequency of heterozygous dominant individual = 424=0.17

Step by step solution

01

Hardy- Weinberg principle : 

The Hardy- Weinberg equilibrium, model, theory, or rule is also known as the Hardy- Weinberg principle. In the absence of evolutionary effects, the frequencies of alleles and genotypes in a population will, on average, remain constant from generation to generation.

02

 Explanation : 

Hardy-Weinberg equation :

p2+2pq+q2=1

where,

p2is frequency for homozygous genotype YY.

q2is frequency for homozygous genotype yy.

2pqis frequency for heterozygous genotype Yy.

Total number of individuals = 24

Frequency of homozygous recessive individual = 1224=0.50

Frequency of homozygous dominant individual = 824=0.33

Frequency of heterozygous dominant individual =424=0.17

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Most popular questions from this chapter

The good genes hypothesis is a theory that explains what?

a. why more fit individuals are more likely to have more offspring

b. why alleles that confer beneficial traits or behaviors are selected for by natural selection

c. why some deleterious mutations are maintained in the population

d. why individuals of one sex develop impressive ornamental traits

When closely related individuals mate with each other, or inbreed, the offspring are often not as fit as the offspring of two unrelated individuals. Why?

a. Close relatives are genetically incompatible.

b. The DNA of close relatives reacts negatively in the offspring.

c. Inbreeding can bring together rare, deleterious mutations that lead to harmful phenotypes.

d. Inbreeding causes normally silent alleles to be expressed.

Which of the following populations is not in Hardy-Weinberg equilibrium?

a. a population with 12homozygous recessive individuals (yy), 8homozygous dominant individuals (YY), and 4heterozygous individuals (Yy)

b. a population in which the allele frequencies do not change over time

c.p2+2pq+q2=1

d. a population undergoing natural selection

Figure 19.2In plants, violet flower color (V) is dominant over white (v). If p=.8and q=0.2in a population of 500plants, how many individuals would you expect to be homozygous dominant (VV), heterozygous (Vv), and homozygous recessive (vv)? How many plants would you expect to have violet flowers, and how many would have white flowers?

Population genetics is the study of:

a. how selective forces change the allele frequencies in a population over time

b. the genetic basis of population-wide traits

c. whether traits have a genetic basis

d. the degree of inbreeding in a population

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