Question 1

What evidence supports the hypothesis that humans originated in Africa?

Accepted Answer

A) H.spaiens genomes contain some Neaderthal DNA sequences. 
B) A Y chromosomal mutation is common in 1 in 1,000 males in Asia. 
C) Mt sequence variation is least in African populations. 
D) Mt sequence variation is highest in African populations. 
A) H.spaiens genomes contain some Neaderthal DNA sequences. 
B) A Y chromosomal mutation is common in 1 in 1,000 males in Asia. 
C) Mt sequence variation is least in African populations. 
D) Mt sequence variation is highest in African populations. D

Question 2

New mutations that arise within a population are typically lost primarily do to

Accepted Answer

A) most mutations occur in individuals that are exposed to environmental mutagens and they therefore experience mutations in many different genes which means that they do not survive to reproduce. 
B) most mutations are lethal. 
C) new mutations all result in a lower reproductive fitness. 
D) populations are of a finite size and new mutations are frequently lost by genetic drift. 
A) most mutations occur in individuals that are exposed to environmental mutagens and they therefore experience mutations in many different genes which means that they do not survive to reproduce. 
B) most mutations are lethal. 
C) new mutations all result in a lower reproductive fitness. 
D) populations are of a finite size and new mutations are frequently lost by genetic drift. D

Question 3

Many human recessive genetic diseases are maintained despite continuing selection against them because

Accepted Answer

A) heterozygotes have a higher fitness than either homozygote. 
B) the recessive alleles mutate to dominant type. 
C) there is no inheritance for the recessive allele. 
D) the dominant allele frequency remains the same over generations. 
A) heterozygotes have a higher fitness than either homozygote. 
B) the recessive alleles mutate to dominant type. 
C) there is no inheritance for the recessive allele. 
D) the dominant allele frequency remains the same over generations. A

Question 4

The proportion of individuals in a population that are of a particular phenotype is the

Accepted Answer

A) phenotype frequency. 
B) genotype frequency. 
C) allele frequency. 
D) None of the choices is correct. 
A) phenotype frequency. 
B) genotype frequency. 
C) allele frequency. 
D) None of the choices is correct.

Question 5

Biological ancestry describes the

Accepted Answer

A) the possibility of inheriting mitochondria from the mother. 
B) memebers of different generations interact. 
C) shared genes but not parentage. 
D) parentage and not shared genes. 
A) the possibility of inheriting mitochondria from the mother. 
B) memebers of different generations interact. 
C) shared genes but not parentage. 
D) parentage and not shared genes.

Question 6

Which of the following is not one of the assumptions of the Hardy-Weinberg law?

Accepted Answer

A) The population is very large. 
B) Non-random mating occurs within the population. 
C) Mutations in the alleles do not occur. 
D) No migration occurs into or out of the population. 
E) The ability of all genotypes for survival and reproduction is the same. 
A) The population is very large. 
B) Non-random mating occurs within the population. 
C) Mutations in the alleles do not occur. 
D) No migration occurs into or out of the population. 
E) The ability of all genotypes for survival and reproduction is the same.

Question 7

The loss of allelic variation due to an event that decreases the size of the entire population is called

Accepted Answer

A) gene flow. 
B) genetic drift. 
C) founder effect. 
D) population bottleneck. 
E) selection. 
A) gene flow. 
B) genetic drift. 
C) founder effect. 
D) population bottleneck. 
E) selection.

Question 8

The proportion of individuals in a population that are of a particular genotype is the

Accepted Answer

A) phenotype frequency. 
B) genotype frequency. 
C) allele frequency. 
D) None of the choices is correct. 
A) phenotype frequency. 
B) genotype frequency. 
C) allele frequency. 
D) None of the choices is correct.

Question 9

In forensics analysis 13 loci are types and the probability of finding an individual in a population with that specific combination of SSR types calculated based on

Accepted Answer

A) determining whihc allele is the rarest for each loci and then determining of the individual sample contains those loci. 
B) calculating the total number of alleles for all loci ion the population. 
C) the Hardy-Weinberg Law 
D) multiplying the total number of alleles in the population by 2. 
A) determining whihc allele is the rarest for each loci and then determining of the individual sample contains those loci. 
B) calculating the total number of alleles for all loci ion the population. 
C) the Hardy-Weinberg Law 
D) multiplying the total number of alleles in the population by 2.

Question 10

The Hardy-Weinberg equation is best at predicting short term genotypic frequencies since

Accepted Answer

A) the equation does not take into consdieration epistatic effects. 
B) it is based on inhertiance based on Mendel's second law. 
C) the equation is based on Mendelian principles of single gene inheritance. 
D) over the long term some of the assumptions of the equation will not be true. 
A) the equation does not take into consdieration epistatic effects. 
B) it is based on inhertiance based on Mendel's second law. 
C) the equation is based on Mendelian principles of single gene inheritance. 
D) over the long term some of the assumptions of the equation will not be true.

Question 11

In humans, brachydactyly is a dominant condition; 6,400 people in a population of 10,000 show the disease (1,600 are BB, 4,800 are Bb) and 3,600 are normal phenotypes (bb).The frequency of the b allele is

Accepted Answer

A) 0.6. 
B) 0.4. 
C) 0.36. 
D) 0.48. 
E) 0.16. 
A) 0.6. 
B) 0.4. 
C) 0.36. 
D) 0.48. 
E) 0.16.

Question 12

How has DNA sequencing clarified the relationship between modern humans and other lineages?

Accepted Answer

A) It has demonstrated that humans are the direct descendants of a linage that was started by Denisovian and Neadtheral interbreeding. 
B) It has demonstrated that modern humans did not interbreed extensively with other lineages. 
C) It has demonstrated that modern humans interbred extensively with other lineages. 
D) It has demonstrated that modern humans are the direct descendants of Neaderthals. 
A) It has demonstrated that humans are the direct descendants of a linage that was started by Denisovian and Neadtheral interbreeding. 
B) It has demonstrated that modern humans did not interbreed extensively with other lineages. 
C) It has demonstrated that modern humans interbred extensively with other lineages. 
D) It has demonstrated that modern humans are the direct descendants of Neaderthals.

Question 13

The frequency of the Hemoglobin A allele is 0.9.The heterozygote with the recessive allele, s, shows resistance to the malarial parasite.What is the frequency of the heterozygote for the pair As?

Accepted Answer

A) 0.81 
B) 0.1 
C) 0.01 
D) 0.18 
E) 0.09 
A) 0.81 
B) 0.1 
C) 0.01 
D) 0.18 
E) 0.09

Question 14

The sum total of all alleles carried in all members of a population is called its

Accepted Answer

A) gene pool. 
B) genome. 
C) ploidy. 
D) polygenic sum. 
E) polymorphism. 
A) gene pool. 
B) genome. 
C) ploidy. 
D) polygenic sum. 
E) polymorphism.

Question 15

Why do the alleles that confer insecticide resistance in mosquitoes become less frequent in the population when insecticide application is disconintued?

Accepted Answer

A) The mosquiotes experienced a bottle neck effect 
B) The alleles were linked to a color variation that allowed for the mosquitoes that were resistant to have a higher rate of predation. 
C) The population experienced genetic drift 
D) The alleles for resistance had a negative fitness cost. 
A) The mosquiotes experienced a bottle neck effect 
B) The alleles were linked to a color variation that allowed for the mosquitoes that were resistant to have a higher rate of predation. 
C) The population experienced genetic drift 
D) The alleles for resistance had a negative fitness cost.

What evidence supports the hypothesis that humans originated in Africa?

New mutations that arise within a population are typically lost primarily do to

Many human recessive genetic diseases are maintained despite continuing selection against them because

The proportion of individuals in a population that are of a particular phenotype is the

Biological ancestry describes the

Which of the following is not one of the assumptions of the Hardy-Weinberg law?

The loss of allelic variation due to an event that decreases the size of the entire population is called

The proportion of individuals in a population that are of a particular genotype is the

In forensics analysis 13 loci are types and the probability of finding an individual in a population with that specific combination of SSR types calculated based on

The Hardy-Weinberg equation is best at predicting short term genotypic frequencies since

In humans, brachydactyly is a dominant condition; 6,400 people in a population of 10,000 show the disease (1,600 are BB, 4,800 are Bb) and 3,600 are normal phenotypes (bb).The frequency of the b allele is

How has DNA sequencing clarified the relationship between modern humans and other lineages?

The frequency of the Hemoglobin A allele is 0.9.The heterozygote with the recessive allele, s, shows resistance to the malarial parasite.What is the frequency of the heterozygote for the pair As?

The sum total of all alleles carried in all members of a population is called its

Why do the alleles that confer insecticide resistance in mosquitoes become less frequent in the population when insecticide application is disconintued?

Genetics: The Study of Biological Information

Mendels Principles of Heredity

Extensions to Mendels Laws

The Chromosome Theory of Inheritance

Linkage, Recombination, and the Mapping of Genes on Chromosomes

DNA Structure, Replication, and Recombination

Anatomy and Function of a Gene: Dissection Through Mutation

Gene Expression: The Flow of Information From DNA to RNA to Protein

Digital Analysis of Genomes

Analyzing Genomic Information

The Eukaryotic Chromosome

Chromosomal Rearrangements and Changes in Chromosome Number

Bacterial Genetics

Organellar Inheritance

Gene Regulation in Prokaryotes

Gene Regulation in Eukaryotes

Manipulating the Genomes of Eukaryotes

The Genetic Analysis of Development

The Genetics of Cancer

Genetics of Complex Traits

Filters

Exam 20: Variation and Selection in Populations

What evidence supports the hypothesis that humans originated in Africa?

New mutations that arise within a population are typically lost primarily do to

Many human recessive genetic diseases are maintained despite continuing selection against them because

The proportion of individuals in a population that are of a particular phenotype is the

Biological ancestry describes the

Which of the following is not one of the assumptions of the Hardy-Weinberg law?

The loss of allelic variation due to an event that decreases the size of the entire population is called

The proportion of individuals in a population that are of a particular genotype is the

In forensics analysis 13 loci are types and the probability of finding an individual in a population with that specific combination of SSR types calculated based on

The Hardy-Weinberg equation is best at predicting short term genotypic frequencies since

In humans, brachydactyly is a dominant condition; 6,400 people in a population of 10,000 show the disease (1,600 are BB, 4,800 are Bb) and 3,600 are normal phenotypes (bb).The frequency of the b allele is

How has DNA sequencing clarified the relationship between modern humans and other lineages?

The frequency of the Hemoglobin A allele is 0.9.The heterozygote with the recessive allele, s, shows resistance to the malarial parasite.What is the frequency of the heterozygote for the pair As?

The sum total of all alleles carried in all members of a population is called its

Why do the alleles that confer insecticide resistance in mosquitoes become less frequent in the population when insecticide application is disconintued?

Genetics: The Study of Biological Information

Mendels Principles of Heredity

Extensions to Mendels Laws

The Chromosome Theory of Inheritance

Linkage, Recombination, and the Mapping of Genes on Chromosomes

DNA Structure, Replication, and Recombination

Anatomy and Function of a Gene: Dissection Through Mutation

Gene Expression: The Flow of Information From DNA to RNA to Protein

Digital Analysis of Genomes

Analyzing Genomic Information

The Eukaryotic Chromosome

Chromosomal Rearrangements and Changes in Chromosome Number

Bacterial Genetics

Organellar Inheritance

Gene Regulation in Prokaryotes

Gene Regulation in Eukaryotes

Manipulating the Genomes of Eukaryotes

The Genetic Analysis of Development

The Genetics of Cancer

Genetics of Complex Traits

Filters