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Biology

Stone: Lesson 2: Punnett Squares

QuestionAnswer
probability the likelihood that a particualr event will occur
True/False: The past outcomes of coin flips greatly affect the outcomes od futurue coin flips. false
Why can the principals of probability be used to predict the outcomes of genetic crosses? The way in which alleles segregate is completly random, similar to the coin flip.
How do genetisits use Punnett squares? Punnett squares can be used to predict and compare the genetic variations that will result from a cross.
genotype the genetic makeup of an organism (Tt)
homozygous organisms that have two identical alleles for the same trait (TT or tt)
phenotype the physical characteristics of an organism (tall vs. short)
heterozygous organisms that have two different alleles for the same trait (Tt)
True/False: Homozygous organisms are true-breeding for a particular trait True
True/False: Plants with the same phenotype have the same genotype False
True/False: In an F(1) cross between two hybrid tall pea plants (Tt), 1/2 of the F(2) plants will have the two alleles for tallness (TT). False
In Mendel's model of segregation, what was the ratio of tall plants to short plants in the F92) generation. 3:1
True/False: Probabilities predict the precise outcome of an individual event. False
How can you be sure of getting the expected 50:50 ratio from flipping a coin? By flipping it multiple times
The ________(larger/smaller) the number of offspring from a genetic cross, the closer the resulting numbers will get to expected values. Larger
True/False: The ratios of an F(1) generation are more likely to match Mendelian predicted ratios if the F(1) generation contains humdreds or thousands of individuals True
Created by: 12yelle
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