Allopatry

Definition
noun
The occurrence of population of related organisms in separate, non-overlapping geographic areas such that members fail to encounter one another, hence, are unable to crossbreed.
Supplement
Allopatry leads to genetic isolation due to geographic separation, and results in the formation of new species over time.
Word origin: ancient Greek allos, other+ Greek patrā, fatherland.

Related forms: allopatry
See also: allopatric speciation, Genetic isolation.

Chromosomes X and Y and Sex Determination

This tutorial looks at sex determination via the sex chromosomes, X and Y. Read it to get more info on X and Y chromosom..

Physiological Homeostasis

Homeostasis is essential to maintain conditions within the tolerable limits. Otherwise, the body will fail to function p..

Neural Control Mechanisms

Neurons generate electric signals that they pass along to the other neurons or target tissues. In this tutorial, you wil..

Community Patterns

Learn about community patterns and the ecological factors influencing these patterns. Revisit some of the ecosystems you..

An artist depiction of a Precambrian multicellular life form.

The Evolution of Cell Organelles

The nucleus containing the genetic material, DNA, and the mitochondria, well-identified as the "powerhouse of the cell",..

Polyploidy

Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..