Natural Selection
What the difference between natural selection and artificial selection (with example)?
●Nature “selects” traits that are better suited for survival and reproduction
●Humans select traits that are desirable. Domestication of plants and animals
If an allele makes up one fourth of the population's alleles then it's frequency is...
What is 25 percent or .25
The three types of selection distributions are...
What is stabilizing, disruptive and directional
The frequency of two alleles in a gene pool is 0.19 (A) and 0.81(a). Assume that the population is in Hardy-Weinberg equilibrium.
Calculate the percentage of heterozygous individuals in the population.
What is 31%
What is the only edible food that never goes bad?
Honey
Multiple African cichlid species arising from one original population is an example of
What is speciation
All genes of all members of a population make up it's
What is gene pool
When individuals at one end form a bell curve have high fitness this is a type of ______________ selection
What is directional?
An allele W, for white wool, is dominant over allele w, for black wool. In a sample of 900 sheep, 891 are white and 9 are black. Calculate the allelic frequencies within this population, assuming that the population is in H-W equilibrium.
What is the dominant allele = 0.9 and the recessive allele =.1
Which artist made history as the youngest winner of the Grammys‘ four main categories in 2020?
Billie Eilish
In his book On the Origin of Species, Darwin proposed a logical mechanism for evolutionary change, which he termed ______________ (different from natural selection).
descent with modification
In a population the sum of all allelic frequency in a population must be...
What is 1 or 100%
When individuals with an average form of a trait have the highest fitness the result is ______________ selection.
What is stabilizing?
In a population that is in Hardy-Weinberg equilibrium, the frequency of the recessive homozygote genotype of a certain trait is 0.09. Calculate the percentage of individuals homozygous for the dominant allele.
What are is 49%
What is considered the rarest blood type in humans?
AB negative
The theory of natural selection is based on two main observations that Darwin made:
1.Traits are heritable
2.More offspring are produced than can survive
A situation where allelic frequencies of a population remain the same is...
What is equilibrium?
If a mutation introduces a new skin color in a lizard population, this factor might determine whether the frequency of the new allele will increase...
What is whether the mutation makes some lizards more fit for their environment than other lizards?
In humans, the Rh factor genetic information is inherited from our parents, but it is inherited independently of the ABO blood type alleles. In humans, Rh+ individuals have the Rh antigen on their red blood cells, while Rh− individuals do not. There are two different alleles for the Rh factor known as Rh+ and rh. Assume that a dominant gene Rh produces the Rh+ phenotype, and that the recessive rh allele produces the Rh− phenotype.
In a population that is in Hardy-Weinberg equilibrium, if 160 out of 200 individuals are Rh+, calculate the frequencies of both alleles.
What is Rh+ = 0.55 and rh = 0.45
In which sport can you score a “try”?
Rugby
A fire wipes out a significant portion of a specific tarantula population living in South America. This population had two color varieties, solid (dominant) and striped (recessive). After the fire, the only surviving individuals all have striped coloring. The allele for striped coloring in this population is considered to be
fixed
Conditions required for equilibrium
What is random mating, no mutations, large population, no gene flow, no genetic drift and no natural selection
In a population of finches in which one group of birds has a short, parrotlike beak and another group has a long, narrow beak, the type of selection is...
What is disruptive?
A rare disease which is due to a recessive allele (a) that is lethal when homozygous, occurs within a specific population at a frequency of one in a million. How many individuals in a town with a population of 14,000 can be expected to carry this allele?
What is approximately 28 individuals
How long does the cicada live underground?
17 years