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5 Cards in this Set
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- Back
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t2-b
what is the formula for recombination frequency given a large number of tetrads |
Recombination frequency = (NPD + 0.5 T) / (NPD + T + PD)
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what is the formula for calculating true map distance
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Map Unit = 100 X [(T + 6 NPD) / 2 (PD + NPD + T)]
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t3
what is complementation and how is it used in genetic analysis |
complementation is when an unknown mutant is crossed with a known mutant to yield wild type offspring which means that the mutations reside at different loci
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define:
-prototrophic -auxotrophic |
prototrophic- can grow on basic media
auxotrophic- needs specific supplements to media |
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what is allelic complementation
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when two mutant alleles of the same gene complement each other. in order to avoid the mistake of interpreting this as a positive test for extragenetic complementation, tetrad analysis should be performed
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