| antibodies | Proteins in the immune system that react to foreign antigens.
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| antigens | Substances, such as proteins, that can trigger an immune response, for example, the production of an antibody. The antigens of the ABO blood group system are examples.
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| demography | The study of the size and makeup of populations.
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| dermatoglyphics | The study of the parallel ridges and furrows on the fingertips, palms, toes, and soles of the feet, commonly referred to as fingerprints, palm prints, and so on.
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| distance curve | A graph that compares some variable at different points in time, for example, height and age. Compare with velocity curve.
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| epidemiological | Pertaining to the study of disease outbreaks and epidemics.
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| Hardy-Weinberg equilibrium | The formula that shows genotype frequencies in a population under hypothetical conditions of no evolutionary change.
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| life history | The study that examines the timing of life cycle events such as fertility, growth, and death.
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| melanin | The pigment largely responsible for human skin color.
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| melanocytes | Specialized skin cells that produce the pigment melanin.
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| menarche | A woman's first menstrual period.
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| menopause | The end of a woman's reproductive cycle.
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| polymorphisms | Variations in the genetic code within a species.
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| single nucleotide polymorphism (SNP) | A single base pair of the genetic code that displays variable expressions among individuals.
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| velocity curve | A graph that compares rate of change in some variable at different points in time, for example, rate of growth at different ages. Compare with distance curve.
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2002 McGraw-Hill Higher Education