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Do Now: Tongue rolling (T) is dominant to not being able to roll (t). In a group of 20 people, 18 can roll their tongues, and 2 cannot. What % of people have the tongue rolling phenotype? What is the minimum % of all of the alleles in the population that are recessive (t)?
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Phenotype frequency is the % of individuals in a population (group of organisms of the same species) that have a certain phenotype. 18/20 = 90%
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A gene pool is the complete set of all alleles found in all individuals in a population OO oo Oo OO Oo Gene Pool: 6 O 4 o
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Allele frequency is a measurement of how common an allele is in a population. P is typically used to represent the frequency of the dominant allele, and Q represents the recessive P A = f(AA) + ½ f(Aa) Q a = f(aa) + ½ f(Aa) By definition, P + Q = 1
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In a population of 100 humans, 90 are homozygous dominant for albinism (non- albino) 8 are heterozygous 2 are homozygous recessive P = f(AA) + ½ f(Aa) =.90 + ½ (.08) =.94 Q = f(aa) + ½ f(Aa) =.02 + ½ (.08) =.06 Check ◦ P + Q = 1….94 +.06 = 1
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A genome is all of the genetic information of an individual. A genome includes both genes AND non- gene information (“junk” DNA) The human genome is 3.2 billion bases long. ATGCTTATGCTGGCTAG CTGCGCTATCGAT…
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We will be playing a game to simulate the effect of the environment on a population
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Locked in a desperate struggle for survival…
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You will select 4 alleles to make up your genome. Each allele gives you a bonus in a specific environment…
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What does the gene pool look like?
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Extinctions, mutations, and environmental change… can your genome make it?
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What’s a genome? Allele frequency? Gene pool? And what does the selecting in biology?
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