Biology Dictionary

  • Karyotype

    Karyotype

    A picture or description of the number, form, and arrangement of chromosomes in a cell nucleus.

  • Karyotypic

    Karyotypic

    Pertaining to the karyotype, especially in terms of genetic makeup or chromosomal structure.

  • Kb

    Kb

    Abbreviation for kilobase, a unit of measurement in genetics equal to 1,000 base pairs of DNA or RNA.

  • Kcat

    Kcat

    The turnover number; the number of substrate molecules each enzyme site converts to product per unit time.

  • Kd

    Kd

    The dissociation constant, a measure of the affinity between a ligand and a protein.

  • Kda

    Kda

    Kilodalton, a unit of molecular mass equal to 1,000 daltons.

  • Keel

    Keel

    A ridge-like structure, especially in flowers or the sternum of birds that supports flight muscles.

  • Isogamete

    Isogamete

    A gamete that is morphologically similar or identical to another gamete with which it fuses.

  • Isogamy

    Isogamy

    A form of sexual reproduction involving the fusion of gametes that are similar in size and form.

  • Isogenetic graft

    Isogenetic graft

    A graft between genetically identical individuals.