Abortion: premature expulsion or loss of an embryo; may be
induced or spontaneous (miscarriage). Allele: any one of a
number of alternative forms of the same gene. Alzheimer's
disease: a disease that causes memory loss, personality changes,
dementia and, ultimately, death. Not all cases are inherited,
but genes have been found for familial forms of Alzheimer's
disease. Altered nuclear transfer (ANT): theroretical procedure
where the nucleus from an egg is removed and an altered genome
is inserted so that, in theory, a human clone is not created and
human pluripotent stem cells can still be harvested; an proposed
alternative to somatic cell nuclear transfer (SCNT) or cloning.
Amniocentesis: sampling of amniotic fluid by needle aspiration
for genetic analysis of a fetus. Artificial Insemination (AI): a
procedure where sperm is placed in a woman’s uterus, cervix, or
vagina by means other than sexual intercourse. Asexual
reproduction: reproduction without the meeting of egg and sperm,
usually creating an exact ge