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Genetics
Test Description: Good review for basic genetics!
Instructions: Answer all questions to get your test result.
1) The order of the nitrogen bases along a gene forms a genetic code that specifies what type of protein will be produced.
A
False
B
True
2) Mutations in body cells (not gametes) are passed on to offspring.
A
True
B
False
3) The different forms of a gene are called
A
alleles.
B
chromosomes.
C
phenotypes.
D
genotypes.
4) The scientific study of heredity is called
A
biochemistry.
B
cytology.
C
genetics.
D
biology.
5) During protein synthesis, messenger RNA
A
links one amino acid to another.
B
carries amino acids to the ribosome.
C
provides a code from DNA in the nucleus.
D
releases the completed protein chain.
6) An organism with two identical alleles for a trait is
A
homozygous.
B
dominant.
C
heterozygous.
D
recessive.
7) An example of a hybrid genotype would be
A
gg or GG.
B
Widow's peak.
C
Gg.
D
GG.
8) According to the chromosome theory of inheritance, genes are carried from parents to offspring on
A
chromosomes.
B
DNA.
C
alleles.
D
RNA.
9) In a dihybrid cross, two hybrid organisms produce offspring. What % of the offspring would be expected to be homozygous recessive?
A
25%
B
50%
C
75%
D
100%
10) DNA has chemicals called bases. So does RNA. Which of the following is true?
A
Thymine pairs with cytosine.
B
Guanine pairs with thymine.
C
DNA has the base uracil.
D
Adenine pairs with uracil in RNA.
*select an answer for all questions
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