A set of chromosomes that contains only one member of each chromosome pair. The sperm and egg are haploid and, in humans, each has 23 chromosomes.
In immunology, a molecule that is incapable, alone, of causing the production of antibodies but which can do so when fastened to a larger antigenic molecule called a carrier. The term “hapten” was taken from the Greek verb “haptein” meaning “to fasten or bind.” Haptin and haptene are alternative forms of this term that was […]
A situation in which the total level of a gene product (a particular protein) produced by the cell is about half of the normal level and that is not sufficient to permit the cell to function normally. Another way to define haploinsufficiency is as a condition that arises when the normal phenotype requires the protein […]
- Hard measles
An acute highly contagious viral disease with fever, runny nose, cough, red eyes, and a spreading skin rash. The eight-day measles is the ordinary measles, also known as rubeola, a potentially disastrous disease. Measles may be complicated by ear infections, pneumonia, encephalitis (that can cause convulsions, mental retardation. and even death), the sudden onset of […]
- Hard palate
The first section of the bony part of the roof of the mouth, located in front of the soft palate.
- Hardy, James D.
the first human lung transplant in 1963, the first animal-to-human heart transplant in 1964, and a double-lung transplant that left the heart in place, in 1987. The 1964 transplant of a chimpanzee heart was done three years before the first human-heart transplant (by Christiaan Barnard). Dr. Hardy died in 2003 at the age of 84. […]