Also referred to as gene migration, gene flow is the introduction of genes from one population to the gene pool of another population. This process changes the composition of the gene pool of the receiving population. Good examples of gene flow include the movement of pollen grains from one plant to another and the movement of people from one place to another.Know More
Gene flow also occurs without migration. For instance, when people travel to another area and mate with people in that area, transfers of genes occur within the population even if the travelers return home. If red-haired people travel from Scotland to another place and mate there, in the next generation there may be some individuals in this destination that possess that trait.
Gene flow also occurs between species. Segments of DNA are transferred from one species to another by viruses as they attack the cells of plants and animals. The introduction of alleles through gene flow allows for the combination of traits and increases variability within the receiving population. The amount of gene flow varies among organisms because sedentary organisms are more isolated than mobile organisms. Ideally, gene flow introduces new genes into a population consequently increasing the genetic variation of the population. Also, gene flow makes distant populations genetically similar.Learn more about Human Anatomy
The webbing that connects the area between the human thumb and index finger is referred to as the thenar space. This area lies beneath the deep fascia, or tissues, on the palmar surface of the adductor pollicis muscle.Full Answer >
Processes that do not require oxygen are referred to as anaerobic processes, a common example of which is fermentation. Fermentation is a process that breaks down sugar molecules without the presence of oxygen. It is an alternative way for cells to manufacture ATP.Full Answer >
Human growth or maturity is prompted by human growth hormone, commonly referred to as HGH, a hormone secreted by the pituitary gland responsible for muscle and bone growth, fat metabolism and the regulation of body composition. Once HGH is secreted, it helps coordinate the various growth processes, such as turning cartilage into bone, one of the main processes responsible for human growth.Full Answer >
A group of the same organisms that live in the same area at the exact same time is referred to as a population. Population is a term used by ecologists.Full Answer >