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Exam 15: Forensic Serology

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Question 21

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Type ________ blood is the least common.

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Question 22

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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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Possible genotypes for the chi...

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Question 23

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Rape evidence should be packaged separately in ________ bags.

A gene pair made up of two similar alleles - for example, AA and BB - is said to be:

Buccal cells are obtained from:

A precipitin test can be used to identify:

The reaction of luminol with blood results in the production of ________ rather than color.

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 -Allele

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

An antigen is a protein that destroys or inactivates a specific antibody.

When serum containing B antibodies is added to red blood cells carrying the B antigen, the blood ________.

________ is the absence of sperm, or sterility in males.

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 -Acid phosphatase

________ is the fluid portion of the blood.

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?

A heterozygous gene pair is made up of two different alleles while a homozygous gene pair is made up of two similar alleles.

Acid-phosphatase is a major constituent of:

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?

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 -Plasma

The blood factors belonging to the A-B-O system are the most important for properly matching a donor and recipient for a transfusion.