In the field of biology, inherited variation refers to genes and genetic information transferring from both parents to offspring. Biological variation occurs in all species, including humans, plants and other animals. Offspring of all living species derives approximately 50 percent of each parent's genes, giving them resemblance to the parents while displaying novel traits, features and characteristics as well, as noted in a report by the BBC.Know More
Many types of traits and features pass along through generations. These characteristics include hair color, eye color and the shape of facial features, like noses and ears. Inherited variation occurs when egg cells divide. Each egg and sperm cell contains approximately half the genetic information necessary for producing individuals. Upon fertilization of the egg, individuals acquire certain traits from parents, and have unique traits and looks.
Inherited variation produces differences in human eye color, such as blue, green and brown. It also creates a difference in skin color in the human population, and determines whether people have ears with lobes or without lobes.
In addition to inherited variation, some differences among people derive from environmental origins. Environmental causes of variation account for differences in cultural norms, behavior and lifestyle. Most people contain a combination of inherited and cultural traits. These traits explain differences in behavior, weight and other variables in very similar individuals, such as twins.Learn more about Molecular Biology & DNA
Human characteristics are inherited through DNA that the child receives from his mother and father. Traits may be determined by a single gene on the DNA or multiple genes. Each person has two sets of each gene, one from each parent.Full Answer >
The disadvantages of cloning include increased risk of inherited diseases, lack of gene variation, ethics and religious dogma associated with it. The term cloning refers to a number of processes used in producing genetically identical copies of a biological entity.Full Answer >
Genetic manipulation, also called genetic engineering, refers to the alteration of the genes of an organism. It involves manually adding new DNA to an organism to add new traits. Examples of genetically engineered organisms include plants that are resistant to certain insects, plants that tolerate herbicides and crops with altered oil content.Full Answer >
An organism's genotype is the entire set of genes that it carries in its genome, and its phenotype is the observable effect of those genes on the body and behavior of the organism. Biologists draw a distinction between genotypes and phenotypes to clarify the difference between an organism's genetic heritage and the effects that its combination of genes has.Full Answer >