Sphingolipids contain a single fatty acid, in amide linkage to the sphingosine backbone.

TLS Online TPP Program

#Id: 9187

#Section 3: Genetics, Cellular and Molecular Biology

Positive Selection: The Spread of Beneficial Mutations

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: 7832

#Section 2: General Biology

TLS Online TPP Program

#Id: 9159

#Section 3: Genetics, Cellular and Molecular Biology

TLS Online TPP Program

#Id: 2246

#Section 3: Genetics, Cellular and Molecular Biology

Some people have an allele called Δ32 at the CCR5 locus in which 32 bp are deleted.

CCR5 that plays a role in inflammatory response. Unfortunately, this protein is also a key to human immunodeficiency virus (HIV) infection. The virus binds to a loop of the CCR5 protein and then enters the cell.

The missing part of the gene codes for the loop in the protein to which the virus attaches.