Genetic Change Over Time Chap 16 Flashcards
On what 2 things does evolution depend?
Natural Variation and Natural Selection
These traits are controlled by only one gene.
Single Gene Trait
This is the sum total of all the genetic information of a population.
Gene Pool
What kind of a trait is tongue rolling?
Single Gene Trait
This is the comparison of how often alleles occur in a certain population.
Relative Frequencey
Height, is controlled by many genes and produces a RANGE of phenotypes. What kind of a trait is it?
Polygenic Trait
What are two sources of natural variation?
Mutations and Gene Shuffling
Which provides a greater source of heritable differences, mutations or gene shuffling?
Gene Shuffling
In a gene pool there are 10 dominant alleles and 40 recessive alleles. What is the relative frequencies of each allele?
10/50 = 20% for dominant allele
40/50 = 80% for recessive allele
What is the name for a change in the relative frequencies of alleles in a population called?
Evolution
What was the name of Darwin’s ship?
H.M.S. Beagle
This is the ability of an organism to survive and reproduce in its environment based upon its characteristics.
Fitness
Sexual reproduction can produce many phenotypes but it cannot do this.
Change the relative frequency of alleles in a population.
The number of phenotypes produced for a given trait depends on . . . .
how many genes control that trait.
What is the name of the process where those organisms that have the greatest fitness are better able to survive, reproduce and pass on their genes?
Natural Selection
