FELIZ NAVIDAD!!

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Unit Test: Evolution

• format: modified true-false, multiple choice, short answer

Macroevolution

POLYPLOIDY

• polyploidy is the condition that exists when an organism has one or more extra sets of chromosomes, as a result of errors in cell division
• this often leads to sympatric speciation

ADAPTIVE RADIATION

• a process characterized by periods of isolation and dispersal
• this example of allopatric speciation usually occurs when there are new areas for a species to occupy, after mass extinctions, or when natives have not colonized an area
• i.e. galapagos islands, hawaiian archipelago

POLYMORPHISM

• polymorphism is when 2 or more forms of a phenotype are represented in high enough frequencies to be readily noticeable
• a balanced polymorphism is when the frequences of the characteristics remain fairly constant over time
• a transient polymorphism is one that is changing in frequency over time
• i.e. if a population with a high incidence of sickle cell anemia moves to a location where malaria is no longer present...the gene will begin to disappear

Human Evolution

• the following website will assist you in completing the worksheet
• Becoming Human

Unit Test: Evolution

• your test for this unit will take place on Friday, December 19th
• it will include the following sections of the IB curriculum guide:
• 5.4 Evolution. Option D: Evolution, including D1 Origin of life on Earth, D2 Species and Speciation, D4 The Hardy-Weinberg Principle, and D3 Human Evolution
• Format: true-false, multiple choice, problem solving, short answer