Unit Four
Genetics
Vocabulary
A.
B.
______1.
Alleles
Dominant
allele
C.
______3.
Gene
D.
______4.
Genetics
______5.
Genotype
______6.
Heterozygous
______7.
Homozygous
______8.
Hybrid
______9.
Phenotype
______2.
______10.
______11.
______12.
______13.
Punnett
Square
E.
F.
G.
H.
Purebred
A characteristic that an organism can pass on to
its offspring through its genes.
A chart that shows all the possible combinations of
alleles that can result from a genetic cross.
A segment of DNA on a chromosome that codes for
a specific trait.
An allele that is masked when a dominant allele is
present.
An allele whose trait always shows up in the
organism when the allele is present.
An organism that always produces offspring with
the same form of a trait as the parent.
An organism that has two different alleles for a
trait; an organism that is heterozygous for a
particular trait.
An organism’s genetic makeup, or allele
combination.
An organism’s physical appearance, or visible
traits.
Recessive
Allele
I.
Trait
J.
Having two different alleles for a trait.
K.
Having two identical alleles for a trait.
L.
The different forms of a gene
M.
The scientific study of heredity.