Name ______________________________ ______________Block ______________ Date ___________
Genetics Test
____ 1. dominant
a) Chart used to organize all possible
combinations of offspring
____ 2. homozygous recessive
b) Different forms of the same gene
____ 3. recessive
c)
Combination of letters that
represents an organisms genetic
makeup
d) The mathematical chance that
something will happen
____ 4. genotype
____ 5. trait
e) When the offspring inherits two
identical dominant alleles
____ 6. heterozygous
f)
____ 7. Gregor Mendel
g) When the offspring inherits two
different alleles
____ 8. homozygous dominant
h) The allele that is always masked in
the presence of the stronger allele
____ 9. genetics
i) The passing of traits from parent to
offspring
____ 10. gene
j)
The allele that always shows up
and hides the weaker allele
Characteristic of an organism that
makes it unique (hair color, skin
color)
k) The physical appearance of the
inherited combination of alleles
____ 11. Punnett Squares
____ 12. probability
l) Instructions for an inherited trait
____ 13. phenotype
m). The study of heredity
____ 14. Heredity
.
____. 15 Allele
n). When the offspring inherits two
identical recessive alleles
o) The father of Genetics
Name ______________________________ ______________Block ______________ Date ___________
_____ 16. If a pea plant is heterozygous for purple color it can also be called a ______________
a.
Heredity
c.
Purebred
b.
Genetics
d.
Hybrid
Miranda is a new student on the Gorilla team. She has natural brown hair with curls and dark
brown eyes. She is very small, skinny and claims that can speak four different languages
fluently. Miranda is vegetarian and she loves animals, she has a Yorkie named Tina that she
takes to cheerleading practice every other day. Miranda is an excellent cheerleader and she is
hoping to meet other students with similar interests.
17. From the paragraph above, provide two examples of environmental only traits.
18. Fr om the paragraph above, provide two examples of genetics only traits.
19. From the paragraph above, provide one example of a trait that is affected by genetics and
the environment. Explain your answer.
20. SpongeBob is known for his big round eyes (R), which is dominant over an oval eye shape
(r). If he is heterozygous for his round eye shape and marries a woman with oval eye shape,
what type of eyes might the kids have? Show all the steps.
a. Complete the punnett square.
b. List the possible genotypes and phenotypes for their children.
c. What are the chances of a child with round eye shape? ________ %
d. What are the chances of a child with oval eye shape? ______ %
Name ______________________________ ______________Block ______________ Date ___________
21. The long hair of persian cats is recessive to the short hair of siamese cats,. Mating of
persians with siamese cats produces an f1 generation heterozygous for both of these
characteristics. Complete a punnett square to show the expected genotypes and phenotypes of
the offspring from the mating of these f1 heterozygous cats.
22. Timothy has attached earlobes like his maternal grandfather. His mother and father both have free
earlobes, which are dominant. Which statement best explains how Timothy inherited attached
earlobes?
A. He received a recessive allele from each parent.
B. He received dominant allele from each parent.
C. He received a recessive allele from his mother and a dominant allele from his father.
D. He received a dominant allele from his mother and recessive allele from his father.
Name ______________________________ ______________Block ______________ Date ___________
23. In pigeons, the allele for normal feathers (F) is dominant to the allele for frizzy feathers (f).
If a purebred, normal-feathered bird is crossed with a frizzy-feathered bird, how many different feather
phenotypes are possible in the offspring.
A.
1
B.
2
C. 3
D. 4