Match Each Term with Its Correct Definition

Multiple Choice

Match each term with its correct definition.
-locus

A) displayed traits are unchanged over multiple generations
B) first generation of offspring from a parental cross
C) true-breeding organisms used in the initial cross
D) result of a cross between two first-generation organisms
E) allele that is expressed no matter what other allele is present
F) allele that is expressed only if two identical copies are present
G) any organism with two identical copies of an allele
H) any organism with two different forms of an allele
I) F₁ heterozygote (for a single trait)
J) genetic makeup of an organism
K) physical traits of an organism
L) likelihood of something occurring if the occurrence is a matter of chance
M) organism that is heterozygous for two different traits
N) where an allele is found on a chromosome
O) when one allele cannot completely mask the effects of another allele
P) alleles at one locus mask the expression of alleles at a different locus
Q) several different genes contribute to a particular phenotype
R) single allele has multiple phenotypic effects