Which is an example of a Cline?
A cline is the specific set of traits in a population of a given species that have been influenced by the local environment. For example, a population of warm-blooded animals that lived in a cooler climate closer to the North Pole would have larger bodies, allowing them to better conserve heat.
What causes a Cline?
Clines are often cited to be the result of two opposing drivers: selection and gene flow (also known as migration). Selection causes adaptation to the local environment, resulting in different genotypes or phenotypes being favoured in different environments.
What is the largest unit within which gene flow can readily occur?
The largest unit within gene flow can readily occur is a : species. Bird guides once listed the myrtle warbler and Audubon’s warbler as distinct species. Recently, these birds have been classified as eastern and western forms of a single species, the yellow rumped warbler.
What affects gene flow?
There are a number of factors that affect the rate of gene flow between different populations. Gene flow is expected to be lower in species that have low dispersal or mobility, that occur in fragmented habitats, where there is long distances between populations, and when there are small population sizes.
Is gene flow good?
GENETICS OF PLANT DISEASE In plant pathology, gene flow is very important because it deals with the movement of virulent mutant alleles among different field populations. High gene flow in a pathogen increases the size of the population and of the geographical area in which its genetic material occurs.
What are the 2 types of gene flow?
Alternatively, gene flow can take place between two different species through horizontal gene transfer (HGT, also known as lateral gene transfer), such as gene transfer from bacteria or viruses to a higher organism, or gene transfer from an endosymbiont to the host.
Does gene flow cause evolution?
Gene flow is a fundamental agent of evolution based on the dispersal of genes between populations of a species.