TLS Online TPP Program

#Id: 9192

#Section 3: Genetics, Cellular and Molecular Biology

TLS Online TPP Program

#Id: 9193

#Section 3: Genetics, Cellular and Molecular Biology

The allelic frequency at equilibrium (qˆ) depends on the relative fitnesses (usually expressed as selection coefficients) of the two homozygotes:

TLS Online TPP Program

#Id: 9194

#Section 3: Genetics, Cellular and Molecular Biology

Hitchhiking

An important consequence of linkage disequilibrium is hitchhiking. This happens when 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: 9195

#Section 3: Genetics, Cellular and Molecular Biology

Type of natural selection

1. Stabilized natural selection

2. Directional Natural selection

3. Disruptive Natural selection

4. Balance natural selection

TLS Online TPP Program

#Id: 9196

#Section 3: Genetics, Cellular and Molecular Biology

TLS Online TPP Program

#Id: 9197

#Section 3: Genetics, Cellular and Molecular Biology

Stabilized natural selection

Favor intermediate phenotype but eliminate lower and higher-grade phenotype

It introduced homogeneity in the population

Exp - clutch size of birds that lay too many or too few eggs per nest have lower fitness values than do those that lay an intermediate number of eggs