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Chapter 19: Q. 16 (page 484)

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

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

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

What is the difference between micro- and macroevolution?

a. Microevolution describes the evolution of small organisms, such as insects, while macroevolution describes the evolution of large organisms, like people and elephants.

b. Microevolution describes the evolution of microscopic entities, such as molecules and proteins, while macroevolution describes the evolution of whole organisms.

c. Microevolution describes the evolution of organisms in populations, while macroevolution describes the evolution of species over long periods of time.

d. Microevolution describes the evolution of organisms over their lifetimes, while macroevolution describes the evolution of organisms over multiple generations.

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 males and females of a population look or act differently, it is referred to as ________.

a. sexual dimorphism

b. sexual selection

c. diversifying selection

d. a cline
See all solutions

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