They worked on plants in both Stanford and Mather California.
Who are Clausen, Keck, and Hiesey
100
The 2 authors of the bell curve theory
Who are murray and herrnstein
100
the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.
What is phenotype
200
The fitness either consistently increases or decreases. It will not change the average value of a trait, and it will reduce variation.
What is directional selection
200
He created a hypothesis about how populations should exhibit genetic variation for fitness as well as theorem of natural selection stating that rate of which fitness increases is proportional to the additive genetic variation for fitness
Who is Fisher
200
The type of plant used in the study by Clausen, Keck, and Hiesey
What is achillea
200
Tells us nothing about the role of _____ in shaping phenotypic traits
What are genes
300
Intermediate values have the highest fitness. This too also reduces variation. An example of this was seen in Weis and Abrahamson's experiment on flies.
What is stabilizing selection
300
Name 2 reasons why an allele may be deleted
What is that the mutation rate is high or that selection is weak
300
Specific to a particular ____ in a particular ____
What is population/ environment
300
What did murray and herrnstein study?
What is IQ
300
statistic used in breeding and genetics works that estimates how much variation in a phenotypic trait in a population is due to genetic variation among individuals in that population.
What is heritability
400
Extreme values are favored . Variation is increased. Smith's study exhibited this.
What is disruptive selection
400
Rare phenotypes will have the higher fitness than those more common. Selection is imposed by a fluctuating environment.
What is frequency dependent selection
400
What can we learn about the differences between populations in different environments
We can't
400
This method could have easily solved the issues with their initial experiment.
What is the common garden experiment
400
Altering the environment can shift a population's trait distribution
What is heritability less than 1
500
Name which modes are common and which are rare
What is directional and stabilizing are common while disruptive is rare.
500
This occurs when the mean value of the trait, variation in the trait, and mean fitness of the population all cease to change.
What is equilibrium
500
Formular for heritability includes
What is genetic and environmental variation
500
Why were their hypothesis and findings deemed incorrect?
What is that IQ being heritable tells us nothing about the origin of differences between groups.
500
Selecting on the trait will cause a population to evolve