An ethnic stock or division of humans. Naturalists and ethnographers have long divided humans into a variable number of distinct races. However, DNA and other genetic studies have revealed that that most genetic variation, about 94%, is within so-called racial groups while these racial groupings differ from one another only in about 6% of their genes. This means that there is greater genetic variation within racial groups than between them. The concept of race is a superficial and subjective one. All of humankind is a single species.
- Race-based drug
A drug designed for a particular racial group. The first race-based drug was BiDil, a combination of two old drugs that increase levels of nitric oxide. BiDil was tested in African-Americans and reported in 2004 to reduce deaths from heart disease. The very concept of race-based therapy is highly controversial. While some black cardiologists hailed […]
A descriptive term for something that is in a cluster or bunch. For example, a racemose aneurysm is an aneurysm that looks like a bunch of grapes.
- Racemose aneurysm
An aneurysm that looks like a bunch of grapes.
Radiation absorbed dose, a measurement for a dose of ionizing radiation.
An enzyme that coordinates recombination and that is important to the process of error-free DNA repair by recombination.