Dictionary

recent memory See memory, short-term.

receptor 1 In cell biology, a structure on the surface of a cell or inside a cell that selectively receives and binds a specific substance. For example, there are insulin receptors and low-density lipoprotein (LDL) receptors. 2 In neurology, the terminal of a sensory nerve that receives and responds to stimuli.

receptor, visual The layer of rods and cones, the visual cells, of the retina.

recessive A genetic trait that appears only in individuals who have received two copies of a mutant gene, one copy from each parent. The individuals with a double dose of the mutated gene are called homozygotes. Their parents, each with a single dose of the mutated gene, appear normal and are called heterozygotes, or gene … Докладніше

recessive, autosomal See autosomal recessive trait.

recipient In medicine, someone who is given something, such as a blood transfusion or an organ transplant, that is derived from another person (the donor).

recombinant A person with a new combination of genes, a combination not present in either parent, due to parental recombination of those genes.

recombinant clone A clone that contains recombinant DNA.

recombinant DNA molecules A combination of DNA molecules of different origin that are joined using recombinant DNA technology.

recombinant DNA technology A series of procedures that are used to join together (recombine) DNA segments. A recombinant DNA molecule is constructed from segments of two or more different DNA molecules. Under certain conditions, a recombinant DNA molecule can enter a cell and replicate there, either on its own or after it has been integrated … Докладніше

recombination The trading of fragments of genetic material between chromosomes before the egg and sperm cells are created. Key features of recombination include the point-to-point association of paired chromosomes (synapsis), followed by the visible exchange of segments (crossing over) at X-shaped crosspoints (chiasmata). Recombination is the principal way of creating genetic diversity between generations. Recombination … Докладніше

Recombivax-HB A vaccine that stimulates the body’s immune system to produce antibodies against the hepatitis B virus. See also hepatitis B; hepatitis B immunization.