Name: _____________________________________ Date: _____________ Period: ______
Genetics and Heredity Worksheet
Mr. Vorstadt
B _________
SCORE
MATCHING
_____ 1. Genetics
A. Characteristics that are passed on from one
living thing to it young.
_____ 2. Self-pollinate
B. Alleles paired together for a specific trait are
identical/same
_____ 3. Traits
C. When one allele masks/hides the presence of
another, the allele is…
_____ 4. Dominant
D. An allele that is masked/hidden by another is…
_____ 5. Genes
_____ 6. Heterozygous
_____ 7. Recessive
E. All the forms of a gene for any given trait are…
F. Grid system used to determine possible
genotypes of offspring
G. The study of heredity
_____ 8. Hybrid
H. The physical make-up of an organism
_____ 9. Gregor Mendel
I.
_____ 10. Phenotype
J. Alleles paired together that are different from
each other
_____ 11. Genotype
The genetic make-up, of an organism
K. Father of Genetics
_____ 12. Alleles
L. Pollination within one plant
_____ 13. Cross-pollination
M. Take pollen from one plant and put it on
another plant.
_____ 14. Punnett square
_____ 15. Homozygous
N. Combination of two varieties of organisms.
O. A section of chromosomes that determines a
trait.
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Complete the P-squares below.
Cross two guinea pigs, one pure for white fur bb and one hybrid Bb.
%Phenotype
%Genotype
_________Black
_________Homozygous
_________White
________Heterozygous
Cross two pea plants both pea plants are hybrid Rr. Round is dominant.
%Phenotype
%Genotype
______ Wrinkle
______ Homozygous
______ Round
______ Heterozygous
Set up the Punnet squares for each of the crosses listed below.

Round seeds are dominant to wrinkled seeds. Rr x rr
%Phenotype

%Genotype
%Phenotype
%Genotype
______ Wrinkle
______ Homozygous
______ Round
______ Heterozygous
Cross the following RR x rr
%Phenotype
%Genotype
______ Wrinkle
______ Homozygous
______ Round
______ Heterozygous
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

Cross two pea plants one is pure short tt the other is pure tall TT. Tall is dominant.
%Phenotype
______ Tall
%Genotype
______ Homozygous
______ Short
______ Heterozygous
Cross two hybrid pea plants Tt.
%Phenotype

%Genotype
______ Tall
______ Homozygous
______ Short
______ Heterozygous
Cross two hybrid Guinea pigs Bb. Black fur is dominant.
%Phenotype

%Genotype
______ Black
______ Homozygous
______ White
______ Heterozygous
Cross two Guinea pigs one hybrid Bb for black fur and one pure white bb.
%Phenotype
%Genotype
______ Black
______ Homozygous
______ White
______ Heterozygous
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
Cross two hybrid pea plants Gg.
%Phenotype

%Genotype
______ Green
______ Homozygous
______ Yellow
______ Heterozygous
Cross two pea plants one is pure yellow gg the other is pure Green GG. Green is
dominant.
%Phenotype
%Genotype
______ Green
______ Homozygous
______ Yellow
______ Heterozygous
For each genotype below, indicate whether it is heterozygous (He) or homozygous (Ho)
AA _____
Ee ____
Ii _____
Mm _____
Bb _____
ff ____
Jj _____
nn _____
Cc _____
Gg ____
kk _____
MM _____
DD _____
HH ____
LL _____
Pp _____
For each of the genotypes below determine what phenotypes would be possible.


Purple flowers are dominant to white
flowers.

Brown eyes are dominant to blue
eyes
PP___________________
BB_________________
Pp___________________
Bb________________
pp___________________
bb________________
Bobtails in cats are recessive.
BB _________________
Bb _________________
bb________________

Round seeds are dominant to
wrinkled seeds
RR__________________
Rr__________________
rr __________________
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