Dr. Paul's Virtually Biology Show.
Karyotype. A picture of the chromosomes of a cell showing the chromosomes in order by size and shape to facilitate chromosome identification.
Keratin. A fibrous protein found in hair, horns, hooves, feathers, scales and nails of of various vertebrates.
Kinase. An enzyme that catalyzes the transfer of a phosphate group from ATP to another substrate.
Kinesis. A Kinesis is an undirected change in movement in response to an environmental stimulus. Unlike a taxis, a kinesis is not oriented toward or away from the stimulus.
Kin selection. A Kin selection is a kind of natural selection in which individuals increase the number of their genes left to future generations by providing aid to relatives who also share some of the same genes.