Chapter 12 Flashcards
(26 cards)
Small scale genetic changes within a species is _
Microevolution
_ laid ground work for evolutionary thought
Geology
Continual remodeling of earth’s surface is _
Catastrophism
Darwin developed his theory of the origin of species by means of _ _
Natural Selection
_ _ _ proposed natural selection as an evolutionary mechanism
Origin of Species
What type of selection is it when a human breeder takes the place of the environment
Artificial Selection
_ _ _ Unifies ideas about DNA, mutations, inheritance and natural selection
Modern evolutionary synthesis
Natural selection requires _
Variation
Natural selection does not work towards a _
Goal
Natural selection cannot achieve perfectly _ _
Adapted Organisms
Calculations of _ frequencies and _ frequencies allow biologists to detect whether evolution has occurred
allele/gentotype
When allele frequencies do not change from generation to generations, it is called _ _
Hardy-Weinberg equilibrium
Allele Frequencies always _
Change
The conditions for Hardy-Weinberg equilibrium do not occur together in _ _
Natural Populations
When individuals remain in closed groups, mating among themselves rather than with the larger population, it is known as _ _
Nonrandom mating
1 extreme phenotype becomes more prevalent in a population is _ _
Directional Selection
Multiple extreme phenotypes survive at the expense of intermediate forms is _ _
Disruptive Selection
An intermediate phenotype has an advantage over individuals with extreme phenotypes is _ _
Stabilizing Selection
Natural Selection indefinitely maintains more than 2 alleles for a gene is _ _
Balanced Polymorphism
_ _ result from sexual selection, a form of natural selection in which inherited traits even those that seem nonadaptive make an individual more likely to mate
Sexual Dimorphisms
Competition that does not involve a choice by the opposite sex is _ _
Intrasexual Selection
Reflects mate choice by members of the opposite sex is _ _
Intersexual Selection
_ alters allele frequencies by changing one allele into another
Mutations
Many _ do not pass on to the next gernation
Mutations
