K-Ar: Potassium-argon dating technique.
karstic caves: Caves formed in limestone by the action of water.
karyotype: A complete set of all the metaphase chromatid pairs in a cell (literally, “nucleus type”).
kinetochore: See centromere.
kin selection: Differential aid or favoritism toward relatives that promote the inclusive fitness of shared genes.
kinship: Relationships between people that are based on real or imagined descent or (sometimes) marriage.
Klinefelter syndrome: A human clinical syndrome that results from disomy for the X chromosome in a male, which results in a 47,XXX male. Many of the affected males are mentally deficient, have underdeveloped testes, and are taller than average.
knuckle-walking: A type of quadrupedal walking used by chimpanzees or gorillas, in which the forearms rest on the dorsal surface of the middle phalanges of the hands.
kyphosis: (1) Dorsally covex curvature of the spine. (2) Flexion of the cranial base, closing the angle between the basi-occiput and the body of the sphenoid.
kyr: Kiloyears, a unit of thousands of years (100,000 years is 100 kyr).
Andrefsky, W., Jr. 1998. Lithics: Macroscopic Approaches to Analysis. Cambridge: Cambridge University Press.
Keesing, R.M. 1975. Kin Groups and Social Structure. Fort Worth: Harcourt Brace.
Renfrew, C., and P. Bahn. 1996. Archaeology: Theories, Methods, and Practice. New York: Thames and Hudson Inc.
Russell, P.J. 1998. Genetics. Menlo Park: Addison Wesley Longman, Inc.
Wolpoff, M. 1999. Paleoanthropology. second edition. Boston: McGraw-Hill.