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Genetics Test Review 2
Test Description: Genetics Review
Instructions: Answer all questions to get your test result.
1) The Principle of _________________ states that the inheritance of alleles is random.
A
Independent Assortment
B
Incomplete Dominance
C
Segregation
D
Dominance
2) The Principle of ______________________ states that one allele will mask another.
A
Segregation
B
Independent Assortment
C
Dominance
D
Incomplete Dominance
3) Tallness (T) is dominant to shortness (t) in pea plants. Which of the following represents a genotype of a pea plant that is heterozygous for tallness?
A
Tt
B
tt
C
T
D
TT
4) If an individual has two recessive alleles for the same trait, the individual is said to be
A
heterozygous for the trait.
B
homozygous for the trait.
C
mutated.
D
haploid for the trait.
5) The phenotype of an organism
A
represents its genetic composition.
B
reflects all the traits that are physically expressed.
C
occurs only in dominant pure organisms.
D
cannot be seen.
6) What would be the blood type of a person who inherited an A allele from one parent and an O allele from the other?
A
type O
B
type A
C
type AB
D
type B
7) female : XX ::
A
female: gametes
B
male: YY
C
female:eggs
D
male: XY
8) The X and Y chromosomes are called the
A
All of the above
B
sex chromosomes.
C
phenotypes.
D
extra chromosomes.
9) If a characteristic is sex-linked, it
A
occurs most commonly in males.
B
can never occur in females.
C
is always fatal.
D
occurs only in females.
10) In _______________________, two alleles are expressed at the same time.
A
incomplete dominance
B
independent assortment
C
codominance
D
heterozygous
*select an answer for all questions
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