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