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 is Repressor?
The repressor proteins work with the operons. The main function of it is to bind to the operator and block ...
What is Absorption spectrum?
Absorption spectrum is the spectrum of electromagnetic radiation transmitted through a substance, showing dark lines or bands due to absorption ...
What is Physiology?
Physiology is the scientific study of the functions and mechanisms which work within a living system. As a sub-discipline of ...
What is Lysogenic cycle?
Lysogeny, or the lysogenic cycle, is one of two cycles of viral reproduction. Lysogeny is characterized by integration of the ...
What is Embryo sac?
Embryo sac is the female gametophyte of a seed plant consisting of a thin-walled sac within the nucellus that contains ...
What are Molecules?
Molecules are made up of atoms that are held together by bonds or forces. They do not have an electrical ...
