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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
Dominance
B
Segregation
C
Incomplete Dominance
D
Independent Assortment
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
TT
D
T
4) If an individual has two recessive alleles for the same trait, the individual is said to be
A
homozygous for the trait.
B
heterozygous for the trait.
C
mutated.
D
haploid for the trait.
5) The phenotype of an organism
A
cannot be seen.
B
reflects all the traits that are physically expressed.
C
represents its genetic composition.
D
occurs only in dominant pure organisms.
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
male: YY
B
female:eggs
C
male: XY
D
female: gametes
8) The X and Y chromosomes are called the
A
extra chromosomes.
B
All of the above
C
phenotypes.
D
sex chromosomes.
9) If a characteristic is sex-linked, it
A
is always fatal.
B
can never occur in females.
C
occurs only in females.
D
occurs most commonly in males.
10) In _______________________, two alleles are expressed at the same time.
A
heterozygous
B
independent assortment
C
incomplete dominance
D
codominance
*select an answer for all questions
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