Bio 322 Exam 2 quizzes Questions With Complete Solutions
(Figure) a set of 107 experiment populations of Drosophila
melanogaster were maintained at a population size of 16
individuals for multiple generations. In each population, the
initial frequencies of bw75 and bw alleles were equal. After 19
generations, the bw75 was fixed in 28 populations and lost in 30
populations. The results suggest that? Correct Answers Both
alleles are neutral, and fixation events were due to genetic drift
(Figure) the graph below represents the mortality rate of
offspring from marriages registered in 1903-1907 in Italian
populations. The data indicate that the offspring of related
individuals have higher mortality rates. What is a likely cause of
this inbreeding depression? Correct Answers Inbred individuals
are more likely than other individuals to be homozygous for
deleterious recessive alleles
(Figure) the graph below shows the chromosomal variation in
the natural populations of Drosophila pseudoobscura studied by
Dobzhansky. Which of the following conclusions follows from
the data in the graph? Correct Answers Many recessive allele
severely reduce viability and survival when homozygous
(Figure) the graph plots heterozygosity for a variety of human
populations. The data in the graph support? Correct Answers
The "out of Africa" hypothesis
(Figure) the snow goose (Chen carelessness has both a blue and
a white morph, as shown in the figure. Inheritance is Mendelian:
BB and Bb individuals are blue, while by individuals are white.
, If 23 gees in a population of 142 are white and 119 are blue,
how many of the blue geese would you expect to be carriers of
the b allele(I.e.Bb heterozygotes)? Correct Answers 68
(Figure)The figure shows that high levels of DNA sequence
variation are observed at the Adh locus in Drosophila
melanogaster. Based on this observation, which of the following
conclusions would be false? Correct Answers DNA sequence
polymorphism a occur only within introns
(Figure)the graph shows the frequency distribution for a
particular trait(number of dermal ridges) in a sample of British
men. Many such quantitative traits have a normal distribution.
What is a likely cause of this? Correct Answers Many traits are
polygenic and the effects of alleles are additive
A condition that would most likely lead to an increase in the
frequency of an altruistic behavior in a population? Correct
Answers The beneficiaries of the behavior are related to the
individual performing it.
A feature that may have evolved not because it covered an
adaptive advantage but because it was correlated with another
feature that did have an adaptive advantage, is an example of?
Correct Answers Hitchhiking
A feature that reduces the fitness of an individual but benefits
the population or species Correct Answers Cannot evolve by
individual selection
Can evolve by group selection
Will decline in frequency among other nonaltruistic phenotypes
(Figure) a set of 107 experiment populations of Drosophila
melanogaster were maintained at a population size of 16
individuals for multiple generations. In each population, the
initial frequencies of bw75 and bw alleles were equal. After 19
generations, the bw75 was fixed in 28 populations and lost in 30
populations. The results suggest that? Correct Answers Both
alleles are neutral, and fixation events were due to genetic drift
(Figure) the graph below represents the mortality rate of
offspring from marriages registered in 1903-1907 in Italian
populations. The data indicate that the offspring of related
individuals have higher mortality rates. What is a likely cause of
this inbreeding depression? Correct Answers Inbred individuals
are more likely than other individuals to be homozygous for
deleterious recessive alleles
(Figure) the graph below shows the chromosomal variation in
the natural populations of Drosophila pseudoobscura studied by
Dobzhansky. Which of the following conclusions follows from
the data in the graph? Correct Answers Many recessive allele
severely reduce viability and survival when homozygous
(Figure) the graph plots heterozygosity for a variety of human
populations. The data in the graph support? Correct Answers
The "out of Africa" hypothesis
(Figure) the snow goose (Chen carelessness has both a blue and
a white morph, as shown in the figure. Inheritance is Mendelian:
BB and Bb individuals are blue, while by individuals are white.
, If 23 gees in a population of 142 are white and 119 are blue,
how many of the blue geese would you expect to be carriers of
the b allele(I.e.Bb heterozygotes)? Correct Answers 68
(Figure)The figure shows that high levels of DNA sequence
variation are observed at the Adh locus in Drosophila
melanogaster. Based on this observation, which of the following
conclusions would be false? Correct Answers DNA sequence
polymorphism a occur only within introns
(Figure)the graph shows the frequency distribution for a
particular trait(number of dermal ridges) in a sample of British
men. Many such quantitative traits have a normal distribution.
What is a likely cause of this? Correct Answers Many traits are
polygenic and the effects of alleles are additive
A condition that would most likely lead to an increase in the
frequency of an altruistic behavior in a population? Correct
Answers The beneficiaries of the behavior are related to the
individual performing it.
A feature that may have evolved not because it covered an
adaptive advantage but because it was correlated with another
feature that did have an adaptive advantage, is an example of?
Correct Answers Hitchhiking
A feature that reduces the fitness of an individual but benefits
the population or species Correct Answers Cannot evolve by
individual selection
Can evolve by group selection
Will decline in frequency among other nonaltruistic phenotypes
