epigenetics
how your behaviors and environment can cause changes that affect your genes
niche selection
people with particular genetic predispositions will seek out certain environments
polygenetic
multiple genes
trisomy
an extra chromosome
monosomy
absence of a single or pair of chromosomes
polyploidy
more than two sets of chromosomes
trisomy 21
down syndrome; developmental delays, distinctive facial features, risk of cardiac defects at birth and Alzheimer’s disease in adulthood