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\nThree Point Mapping\n

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\nA three-point linkage cross helps determine gene order and distances between three linked genes using observed recombination frequencies. The process involves identifying parental types (most frequent), double crossovers (DCO) (least...\nA three-point linkage cross helps determine gene order and distances between three linked genes using observed recombination frequencies. The process involves identifying parental types (most frequent), double crossovers (DCO) (least frequent), and single crossovers (SCO) to deduce gene order—typically by comparing DCO and parental types to identify the gene in the middle. Gene distances are then calculated by summing relevant recombinant counts (SCO + DCO) and applying the formula: distance (cM) = (recombinants / total progeny) × 100 for each gene pair.\n
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Resource Details

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Curator Rating
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Educator Rating
Not yet Rated
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Media Length
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9:09
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Grade
9th - Higher Ed
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Subjects
Science
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Media Type
Instructional Videos
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Source:
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\nBioMagica\n\n
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Date
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2019
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Language
English
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Audiences
For Teacher Use
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Usage Permissions
Fine Print: Educational Use
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Concepts

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genes, questions, distance
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Additional Tags

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csir, net, three point test cross gene mapping, three point cross genetics, gene mapping, mapping, linkage mapping, three point, three point cross, gene mapping problems, mapping problems, genetics problems, gene distance, three point gene, gene order, recombination frequency problems, recombinants, parental genotypes, gene orderi gene distancei genetics problem linkage, double crossover, single crossover, gene ab, highest number, lowest number, total number, gamuts showing, genes bc, parental type, type, obtained, gene, parental, gamuts, step, capital, question, progenies, form, small, happen, similarly, give, recombinant, identify, find
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