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Genetics Review
Test Description: Unit Test 5 Review on Genetics
Instructions: Answer all questions to get your test result.
1) Some individuals with blood type A may inherit the genes for blond hair, while other individuals with blood group A may inherit the genes for brown hair. This can be explained by the principle of
A
incomplete dominance
B
multiple alleles
C
independent assortment
D
dominance
2) The outward expression of a particular trait in an organism is referred to as its
A
genotype
B
an allele
C
a chromosome
D
phenotype
3) What can be concluded about an organisms phenotype for a particular trait when the genotype of that trait consists of both a dominant and recessive allele
A
the phenotype will be like the trait associated with the recessive allele
B
the phenotype will be a mixture of the traits associated with both the recessive and dominant alleles
C
the phenotype will not be like either of the traits associated with the dominant or recessive allele
D
the phenotype will be like the trait associated with the dominant allele
4) A chicken that has inherited feathers that are colored both black and white is an example of which of the following terms?
A
meiosis
B
codominance
C
fertilization
D
mitosis
5) A kitten has been born with six toes on one foot. Which of the following best explains this?
A
the six toes are the product of a mutation that occurred in one of the kitten's ancestors
B
the parent of the kitten had only four toes
C
Five cells were produced in the process of meiosis as opposed to the normal number, which is four
D
The kitten is the product of a cross-breeding experiment that produced an abnormal number of chromosomes in the offspring
6) The genotype of a hybrid trait in an organism is expressed as
A
the same letter both lower case
B
Different letters with both either upper case or lower case
C
The same letter one upper case, one lower case
D
the same letter both upper case
7) Which term describes the process by which egg and sperm join to begin the formation of a new organism?
A
cloning
B
gene splicing
C
fertilization
D
cross-breeding
8) How could the child of parent with a dominant phenotype end up with a recessive phenotype?
A
through both parents being purebred for the dominant trait
B
through mutations that cause abnormal traits
C
The recessive gene could overpower the dominant gene.
D
through both parents being heterozygous for the dominant trait
9) A Punnett Square is useful in determining
A
the types of mutations that will occur in an organism's lifetime
B
Whether or not a child will possess a dominant or a recessive trait
C
Exactly what the offspring will look like
D
the probability that an offspring inherits a particular trait
10) Accordng to Mendel's principles of probability and genetics what are the chances of a dominant phenotype when crossing two heterozygous traits
A
25%
B
50%
C
75%
D
100%
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