A genetic characteristic of an individual is any trait that can be attributed to a hereditary cause, coded for in inherited DNA. Any other trait is derived from environmental causes, either while within the womb or outside of it. It can be very difficult to determine if a characteristic is genetic, congenital but not genetic or acquired after birth.Know More
Generally, any characteristic that appears in one family for several generations is suspected to have a genetic cause. Some genetic characteristics are fairly well-known and uncontroversial. These include such benign traits as hair color, eye color, attachment of earlobes, hair texture and freckles. However, just because a trait has a genetic basis does not mean that a person with that gene will have that characteristic.
Among the genes that cause various characteristics in individuals, some are dominant and some are recessive. For instance, if a person carries genes for brown eyes from her mother and genes for blue eyes from her father, her eyes will normally be brown. This is because the genes for brown eyes are dominant over the genes for blue eyes. When both are present, the maternal genes have more influence. This dominance is usually not total, and some compromise between opposing genes is often the result.Learn more about Molecular Biology & DNA
A dominant trait, or allele, is a trait in which only one gene copy is needed in order for it to be expressed. The terms dominant and recessive traits describe a simple inheritance pattern that reproductive organisms follow.Full Answer >
Rh factor is an inherited trait that does not affect health but sometimes affects pregnancies of Rh-negative mothers carrying Rh-positive babies, states Mayo Clinic. Rh factor is a protein located on the red blood cells. Individuals with the protein are Rh positive; those without it are Rh negative.Full Answer >
Different versions of the same gene, called alleles, determine how often a trait appears in a population. Children inherit one allele from each parent. One allele is always dominant and appears more often, while one is recessive and only appears if the dominant allele is not present.Full Answer >
The father does not carry the gene for non-identical twins, as releasing more than one egg at a time is a trait that runs in the maternal line. There is no evidence suggesting that identical twins run in families. Women who experience a multiple pregnancy are at higher risk of certain complications.Full Answer >