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
Freckles are a dominant trait. Freckles come from genes and the sun and are most often seen on people with light-colored skin.Full Answer >
An ancestral trait is a genetic similarity passed down to subsequent generations, such as eye and skin color. Male pattern baldness and flushed cheeks are also considered ancestral traits.Full Answer >
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 >
The genetic code is important because it provides instructions for protein synthesis. All organisms on Earth utilize proteins in chemical reactions to facilitate physiological functions. Differences in genetic code result in different proteins, and thus different genetic variations in organisms.Full Answer >