Question 1

A forensic scientist is examining a pair of underwear with a suspected seminal stain. What tests should she perform on the underwear? What does a positive reaction for each test indicate?

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Question 2

Three blood samples are exposed to the antiserums shown below with the given reactions. Based on these results, determine the ABO/Rh blood type of each sample.

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Question 3

Match the word in Column 1 to its definition in Column 2. Each answer can only be used once.
A)A protein that destroys or inactivates a specific antigen
B)An abnormally low sperm count
C)The liquid that separates from the blood when a clot is formed
D)The physical manifestation of a genetic trait such as shape, color, and blood type
E)A structure in the cell nucleus composed of DNA, along which the genes are located
F)A substance that stimulates the body to produce antibodies against it
G)The basic unit of heredity, consisting of a DNA segment located on a chromosome
H)The clumping together of red blood cells by the action of an antibody
I)The male sex chromosome
J)An enzyme found in high concentration in semen
K)The female sex chromosome
L)The fluid portion of unclotted blood
M)Any of several alternative forms of a gene located at the same point on a particular pair of chromosomes
N)The absence of sperm cells in semen
O)The particular combination of genes present in the cells of an individual
-Phenotype

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Question 4

The most widespread application of serology is the typing of whole blood for its A-B-O identity. Why do these tests matter to the forensic scientist?

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Question 5

What three questions must the criminalist answer when examining dried blood? Which tests or analysis tools can be used to answer each question?

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Question 6

Match the word in Column 1 to its definition in Column 2. Each answer can only be used once.
A)A protein that destroys or inactivates a specific antigen
B)An abnormally low sperm count
C)The liquid that separates from the blood when a clot is formed
D)The physical manifestation of a genetic trait such as shape, color, and blood type
E)A structure in the cell nucleus composed of DNA, along which the genes are located
F)A substance that stimulates the body to produce antibodies against it
G)The basic unit of heredity, consisting of a DNA segment located on a chromosome
H)The clumping together of red blood cells by the action of an antibody
I)The male sex chromosome
J)An enzyme found in high concentration in semen
K)The female sex chromosome
L)The fluid portion of unclotted blood
M)Any of several alternative forms of a gene located at the same point on a particular pair of chromosomes
N)The absence of sperm cells in semen
O)The particular combination of genes present in the cells of an individual
-Y chromosome

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The answer of Match the word in Column 1 to...

Question 7

To determine the human or non-human origin of a blood sample, the forensic scientist needs antibodies for each species of interest. Briefly describe how antibodies capable of reacting are produced in animals.

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Question 8

An individual's father has a genotype of Tt at one locus. The mother has a genotype of TT. What are the possible genotypes for their child? Identify the likelihood of inheriting each specific genotype, and if each type is homozygous or heterozygous.

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Question 9

What is the difference between an antibody and an antigen? What happens when an antibody reacts with its specific antigen?

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Question 10

Match the word in Column 1 to its definition in Column 2. Each answer can only be used once.
A)A protein that destroys or inactivates a specific antigen
B)An abnormally low sperm count
C)The liquid that separates from the blood when a clot is formed
D)The physical manifestation of a genetic trait such as shape, color, and blood type
E)A structure in the cell nucleus composed of DNA, along which the genes are located
F)A substance that stimulates the body to produce antibodies against it
G)The basic unit of heredity, consisting of a DNA segment located on a chromosome
H)The clumping together of red blood cells by the action of an antibody
I)The male sex chromosome
J)An enzyme found in high concentration in semen
K)The female sex chromosome
L)The fluid portion of unclotted blood
M)Any of several alternative forms of a gene located at the same point on a particular pair of chromosomes
N)The absence of sperm cells in semen
O)The particular combination of genes present in the cells of an individual
-X chromosome

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The answer of Match the word in Column 1 to...

Question 11

What type of packaging should NOT be used for biological evidence? Why? What type of packaging should be used instead for articles containing biological evidence?

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Quiz 15: Forensic Serology

A forensic scientist is examining a pair of underwear with a suspected seminal stain. What tests should she perform on the underwear? What does a positive reaction for each test indicate?

Three blood samples are exposed to the antiserums shown below with the given reactions. Based on these results, determine the ABO/Rh blood type of each sample.

The most widespread application of serology is the typing of whole blood for its A-B-O identity. Why do these tests matter to the forensic scientist?

What three questions must the criminalist answer when examining dried blood? Which tests or analysis tools can be used to answer each question?

To determine the human or non-human origin of a blood sample, the forensic scientist needs antibodies for each species of interest. Briefly describe how antibodies capable of reacting are produced in animals.

An individual's father has a genotype of Tt at one locus. The mother has a genotype of TT. What are the possible genotypes for their child? Identify the likelihood of inheriting each specific genotype, and if each type is homozygous or heterozygous.

What is the difference between an antibody and an antigen? What happens when an antibody reacts with its specific antigen?

What type of packaging should NOT be used for biological evidence? Why? What type of packaging should be used instead for articles containing biological evidence?