PthXo1, a TAL effector of the rice pathogen Xanthomonas oryzae, activates expression of the rice gene Os8N3, allowing Xanthomonas to colonize rice plants.

TLS Online TPP Program

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#XL - T Zoology

Proportional contribution of genotypes to population

TLS Online TPP Program

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#XL - T Zoology

Relative genotypic frequency after selection

TLS Online TPP Program

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#XL - T Zoology

Selection coefficients-  The allelic frequency at equilibrium (qˆ) depends on the relative fitnesses of the two homozygotes:

TLS Online TPP Program

#Id: 2176

#XL - T Zoology

Positive Selection: The Spread of Beneficial Mutations

TLS Online TPP Program

#Id: 2177

#XL - T Zoology

Hitchhiking - An allele at one locus spreads by natural selection acting on a second locus that is in linkage disequilibrium with  the first.

TLS Online TPP Program

#Id: 2178

#XL - T Zoology

Mutation and natural selection act as opposing forces on detrimental alleles.