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Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
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amiza amiza
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9 years ago
The map indicates the order of genes on a chromosome and the number of map units between adjacent gene pairs. Give the expected frequency of gametes produced by organisms with the following genotypes. Assume one map unit equals 1% recombination and that interference is zero.

Ad/aD
Express your answer as four numbers (each expressed to one decimal place), separated by commas (example 24.5, 24.5, 25.5, 25.5)
Ad____ %, aD____%, AD____%, ad____%.

DeF/dEf
Express your answer as eight numbers (each expressed to two decimal places), separated by commas (example 23.46, 23.46, 15.52, 15.52, 11.02, 11.02, 0.22, 0.22)
DeF____ %, dEf____%, DEf____%, deF____%, Def ____%, dEF____%, DEF____% def____%

BdE/bde
Express your answer as four numbers (each expressed to two decimal places), separated by commas (example 23.46, 23.46, 15.52, 15.52, 11.02, 11.02)
Frequency of gametes: BdE____ %, bde____%, Bde____%, bdE____%.  
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rsbrsb
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9 years ago
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#2
9 years ago
Quote from: rsb (9 years ago)
Ad/aD

37.8, 37.8, 12.2, 12.2

[ (1-0.1) * (1-0.18) * 0.5 ] + [ 0.1 * 0.18 * 0.5 ] = 0.378 = 37.8%

For the first part, we multiply the frequencies of no crossover and then we are adding the frequency of double crossover.
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#3
9 years ago
Can anyone give actual values for parts C and D? Or an explanation at least?
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