Directional selection Notes: Definitions & Explanations PDF | Download eBooks
Study Directional selection lecture notes PDF with biology definitions and explanation to study What is Directional selection?. Study directional selection explanation with biology terms to review biology course for online degree programs.
Directional selection Definition:
Directional selection occurs when conditions favor individuals exhibiting one extreme of a phenotypic range, thereby shifting a population's frequency curve for the phenotypic character in one direction or the other.
Campbell Biology by J.B. Reece, L.A. Urry, M.L. Cain, S.A. Wasserman, P.V. Minorsky, R.B. Jackson
Directional selection Notes:
Directional selection is common when a population's environment changes or when members of a population migrate to a new (and different) habitat. For instance, an increase in the relative abundance of large seeds over small seeds can lead to an increase in beak depth in a population of Galapagos finches. SO in this way external environmental factors may contribute towards the selection of a phenotype.
Keep Learning with Biology Notes
What are Photons?
A photon is a type of elementary particle which is basically the force carrier for the electromagnetic force, even when ...
What is Heart rate?
Heart rate is the speed of the heartbeat measured by the number of contractions (beats) of the heart per minute ...
What is Blood?
Blood is a body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to ...
What are Capillary beds?
Individual capillaries are part of the capillary bed, an interweaving network of capillaries supplying tissues and organs. The more metabolically ...
What is Pharynx?
The pharynx is the part of the throat behind the mouth and nasal cavity, and above the esophagus and larynx ...
What is Mitochondrial myopathy?
A group of neuromuscular diseases caused by damage to the mitochondria that are the main energy-producing structures in cells and ...
