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

TLS Online TPP Program

#Id: 7900

#Unit 2. Cellular Organization

Leber’s hereditary optic neuropathy

caused by a missense mutation in the mtDNA gene

encoding subunit 4 of the NADH-CoQ reductase

TLS Online TPP Program

#Id: 8440

#Unit 10. Ecological Principles

Source–sink metapopulation model - A population model that builds on the basic metapopulation model and accounts for the fact that not all patches of suitable habitat are of equal quality.

TLS Online TPP Program

#Id: 992

#Unit 5. Developmental Biology

Bicoid act as the anterior morphogen.

TLS Online TPP Program

#Id: 3772

#Unit 1. Molecules and their Interaction Relevant to Biology

Matter is anything that takes up space and has mass.

TLS Online TPP Program

#Id: 3655

#Unit 3. Fundamental Processes

Certain archaebacteria lack a gene for CysRS. In these cells, Cys–tRNACys is produced by a ProRS (called ProCysRS).