GRADED A
simply inherited trait
typically, affected very little by environment
Polygenic traits
affected by many genes with no gene having an overriding influence
Threshold traits
polygenic traits that exhibit categorical phenotypes
Test Mating
a mating designed to reveal the genotype of an individual for a small number of loci -
shows only simply inherited traits
Statistic
estimate of a parameter
Parameter
a value that describes a population
population
all members of a group
sample
a subset of the population
we can seldom measure all the members of a population
Variable
whatever trait is measured on a group of individuals
discrete
has distinct classes