Genetics ch 27 and 28
In this equation p2 + 2pq + q2 = 1, what does the term 2pq represent
The genotype frequency of heterozygous individuals
A SNP would best be described as
A single nucleotide difference between two DNA sequences
Heritability may be calculated as which of the following
Genetic variance divided by total variance
Which of the following is not true concerning a population in equilibrium according to the Hardy-Weinberg rule?
Selection is favoring the dominant allele
The coefficient of inbreeding (F) tells us what about an individual
The probability that they are homozygous due to inheritance from a common ancestor
Polygenic inheritance may result in a continuum of phenotypes because
as the number of genes controlling a trait increases and the influence of environment variation becomes greater, there is a blurring of discreteness
The prevalence of the allele for sickle cell anemia in some populations is an example of?
balancing selection
Most natural populations are in a state of equilibrium according to Hardy-Weinberg.
false
a dominant allele is always the more fit
false
Inbreeding reduces which of the following variances to near zero?
genetic variance
a heritabilty value of .997 indicates which of the following
majority of the pheontypicvariation has a genetic basis
Genetic drift has a greater influence on ________ populations
small
Which of the following types of selection favors the survival of individuals with the intermediate phenotype?
stabilizing selection
the square root of the variance is called the
standard deviation
Human society favors outbreeding, or the mating of individuals that are genetically unrelated.
true
In Hardy Weinberg equilibrium, there is no evolution
true
New genetic variation in a population is a critical aspect of microevolution
true
Positive assortative mating does not change allele frequencies but does decrease the expected number of heterozygotes
true
Realized heritability may be determined from artificial selection experiments
true
If the allele frequency of the dominant allele is 0.4, what value is used for the term p2 in the equation p2 + 2pq + q2 = 1?
.16
In a given population of Drosophila, curly wings (c) is recessive to the wild-type condition of straight wings (c+). You isolate a population of 35 curly winged flies, 70 flies that are heterozygous for straight wings and 45 that are homozygous for straight wings. What is the total number of alleles in the gene pool?
300
In a given population of Drosophila, curly wings (c) is recessive to the wild-type condition of straight wings (c+). You isolate a population of 35 curly winged flies, 70 flies that are heterozygous for straight wings and 45 that are homozygous for straight wings. What is the frequency of alleles in this population?
46.7% c; 53.3% c+
Which type of selection would lead to two distinct phenotypes
disruptive selection
QTL mapping can rely on the relationship between genes for quantitative traits and which of the following?
molecular makers such as rflps
A group of individuals from the same species that can interbreed with one another is the definition of a ________.
population
