Glycosphingolipids as determinants of blood groups.

TLS Online TPP Program

#Id: 9198

#Section 3: Genetics, Cellular and Molecular Biology

TLS Online TPP Program

#Id: 9199

#Section 3: Genetics, Cellular and Molecular Biology

Directional Natural selection

Directional selection favors individuals at one extreme of a phenotypic distribution that have greater reproductive success in a particular environment.

TLS Online TPP Program

#Id: 9200

#Section 3: Genetics, Cellular and Molecular Biology

1. Resistant to pesticide in insect

2. Antibiotic resistant in pathogen

3. Industrial melanism

TLS Online TPP Program

#Id: 9201

#Section 3: Genetics, Cellular and Molecular Biology

TLS Online TPP Program

#Id: 9202

#Section 3: Genetics, Cellular and Molecular Biology

Disruptive Natural selection

Disruptive selection favors the survival of individuals at both extremes of a range, rather than the  intermediate.

Increase variance in the population because select those phenotype which are away from mean.

It maintain balance polymorphism and maximum selection coefficient value.

TLS Online TPP Program

#Id: 9203

#Section 3: Genetics, Cellular and Molecular Biology

Balance natural selection

Balancing selection is a type of natural selection that maintains genetic diversity in a population.

In balancing selection, two or more alleles are kept in balance, and therefore are  maintained in a population over the course of many generations.