Genetics Test Study Guide Graded A+
Which of the following influences a phenotype?
A. always genotype alone
B. always genotype and environment
C. always environment alone
D. sometimes genotype and environment
Use the picture to answer the question.
......... (Parents)
......Bb..............
1). Which of the following influences a phenotype?
a. always genotype alone
b. always genotype and environment
c. always environment alone
d. sometimes genotype and environment
a cross between two brown eyed parents is shown above. which statement best explains
why blue eyes appear only in 25% of offspring?
a. it is a mutated trait.
b. it is a recessive trait.
c. it is a dominant trait.
d. it is an acquired trait.
Ans: B. It is a recessive trait.
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, 3). Of sixteen rabbits just born, thirteen have brown fur and three have white fur. the trait for
white fur is considered to be ______________.
a. recessive
b. bossy
c. stronger
d. dominant
Ans: A. recessive
4). Who is the austrian monk whose work with pea plants helped him come up with a theory of
heredity?
a. gregor mendel
b. charles darwin
c. robert hooke
d. rudolph virchow
Ans: A. Gregor Mendel
5). Which term correctly describes an individual with a pair of the same alleles for a trait?
a. homologus
b. heterologus
c. homozygous
d. heterozygous
Ans: C. homozygous
6). Which of these terms describes the genetic information that is passed from parents to
offspring?
a. genotype
b. phenotype
c. phenocopy
d. trait
Ans: A. genotype
7). Look at the punnett square.
.......a ...........a
a .....aa .......aa
a .....aa ........aa
if the two parents represented in the punnett square have four offspring, what does the
punnett square tells you?
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