This category explores the scientific theory of how living organisms change over time through natural selection. Topics in this category may include the history of evolutionary thought, the mechanisms of evolution, and the evidence supporting the theory of evolution. Additionally, posts may discuss current research in the field and its implications for understanding the diversity of life on Earth.
Definition of Biological Species Concept (BSC) The biological species concept (BSC) is a widely used definition of a species in biology. This concept defines a species as a group of organisms that can interbreed and produce viable offspring. The BSC was proposed by Ernst Mayr in 1942 and has been used extensively in the study […]
What is the biological species concept? Its merits and demerits Read More »
What is speciation? Speciation is the process by which new species arise from existing ones. The genetic and ecological factors that contribute to speciation are complex and multifaceted, and different modes of speciation can occur under different circumstances. In this class note, we will explore the three main types of speciation: allopatric, sympatric, and parapatric
What is speciation, and describe 3 types of speciation with examples Read More »
Gene flow is the movement of genetic material (i.e., genes) from one population to another. This can occur through the migration of individuals or the exchange of gametes (i.e., sperm and eggs) between populations. Gene flow can significantly impact the genetic makeup of a population and can affect the evolution of a species. A critical
Gene Flow: Its Role in Shaping Populations and Species Read More »
The founder effect is a phenomenon that occurs when a small group of individuals, known as founders, establish a new population that is genetically distinct from the larger population from which they came. This can happen as a result of geographic isolation, colonization, or other factors that cause a subset of a population to become
Founder Effect: Uncovering the Beauty in Genetic Diversity, a true story Read More »
