Biology Chapter 14/15

Pleiotropy

the many effects of a particular gene; multiple symptoms of inherited disorders

Epistasis

one gene affects the expression of a gene at another location

Polygenic

multiple genes influence the expression of a single phenobarbitalstype

Nondisjunction

the failure of homologous chromosomes to separate during gamete formation/meisosi

Monosomy

loss of an autosome - lethal

Trisomy

gain of an autosome - mostly lethal

Law of Segregation

each individual has 2 factors for every characteristic; separate when gametes are formed

Law of Independent Assortment

alleles for different characters - separate independently of each other during gamete formation

principle of genes

discrete factors that determine characteristics

principle of dominance

one form of gene/allele is dominant