See Also: linkage group(encyclopedia)
linkage group(medicine)
linkage(encyclopedia)
Y-linkage(medicine)
linkage(dictionary)
linkage(dictionary)
map, linkage(medicine)
Linkage(medicine)
linkage map(medicine)
linkage marker(medicine)

altruism (iou) and linkage group (sh)


altruism (iou)



altruism noun. M19.
[French altruisme (A. Comte), from Italian altrui somebody else: see -ISM.]
Regard for others as a principle of action; unselfishness.
altruist noun an altruistic person M19.
altru'istic adjective of, pertaining to, or practising altruism; unselfish: M19.
altru'istically adverb M19.

linkage group (sh)




All the genes on a single chromosome.

They are inherited as a group; during cell division they act and move as a unit rather than independently. Variations in linkage groups can occur if a chromosome breaks, and the sections join with the partner chromosome if it has broken in the same places. This exchange of genes between chromosomes, called crossing-over, usually occurs during meiosis. Sex linkage is the tendency of a characteristic to be linked to one sex; sex-linked traits in humans include red-green colour blindness and hemophilia.