5 - Complementation in diploids

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10 Terms

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Hybrid

Derived from two genetically different parents

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Monohybrid

Hybrid or heterozygous for one gene

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Dihybrid

Hybrid or heterozygous for two different genes

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In a monohybrid cross, what is the F2 ratio of genotypes

1:2:1

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In a monohybrid cross, what is the F2 ratio of phenotypes

3:1 (dominant:recessive)

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Why did Mendel work on genes on separate chromosomes

If they were linked on the same chromosome they could only be segregated by crossing over

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Ratio of crosses that obey Mendel’s principle of independent assortment

9:3:3:1

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Epistasis

Interactions between genes controlling the same phenotype

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How to find genes controlling the same trait

Mutational analysis, complementation analysis

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Allelic mutations

Those that are members of the same complementation group