| A | B |
| acid phosphatase | enzyme found in high concentration in semen |
| agglutination | clumping together of red blood cells by the action of an antibody |
| allele | any of several alternative forms of a gene located at the same point on a particular pair of chromosomes |
| antibody | protein in the blood serum that destroys or inactivates a specific antigen |
| antigen | substance usually a protein that stimulates the body to produce antibodies against it |
| antiserum | blood serum that contains specific antibodies |
| aspermia | absence of sperm sterility in males |
| chromosome | threadlike structure in the cell nucleus on which genes are located |
| deoxyribonucleic acid (DNA) | molecules that carry the body's genetic information |
| egg | female reproductive cell |
| enzyme | protein that acts as a catalyst for certain specific reactions |
| erythrocyte | red blood cell |
| gene | basic unit of heredity consisting of a DNA segment located on a chromosome |
| genotype | particular combination of genes present in the cells of an individual |
| hemoglobin | red blood cell protein that transports oxygen in the bloodstream |
| heterozygous | having two different allelic genes on two corresponding positions of a pair of chromosomes |
| homozygous | having two identical allelic genes on two corresponding positions of a pair of chromosomes |
| hybridoma cells | fused spleen and tumor cells Used to produce identical monoclonal antibodies |
| locus | physical location of a gene on a chromosome |
| luminol | most sensitive chemical test that is capable of presumptively detecting bloodstains reaction with blood emits light |
| monoclonal antibodies | collection of identical antibodies that interact with a single antigen site |
| oligospermia | abnormally low sperm count |
| phenotype | physical manifestation of a genetic trait such as shape color or blood type |
| plasma | fluid portion of unclotted blood |
| polyclonal antibodies | series of antibodies is produced responding to a variety of different sites on the antigen |
| precipitin | antibody that reacts with its corresponding antigen to form a precipitate |
| serology | study of antigen-antibody reactions |
| serum | liquid that separates from the blood when a clot is formed |
| sperm | male reproductive cell |
| X chromosome | female sex chromosome |
| y chromosome | male sex chromosome |
| zygote | cell arising from the union of an egg and a sperm cell |