m.u. MAC macro- macromeres macromolecule macrophage macrorestriction map magnesium magnetic resonance imaging (MRI) major histocompatibility complex (MHC) malignant malignant tumor malonate mammogram manic-depression Manx map unit (m.u.) mapping mapping function Marfan's syndrome marginal zone marker marker retention mass mass-action ratio mass number Mass spectrometry mate-killer maternal effect maternal effect lethal maternal inheritance mating type matroclinous inheritance matter maturation promoting factor May-Thurner Syndrome mean mean fitness of the population W(bar) medi- medial hinge point cells median medium medulla mega- Megabase (Mb) megalo- -megaly meiocyte meiosis meiospore melting melting of DNA melting point membrane membrane attack complex (MAC) membrane potential Mendel's first law Mendel's second law Mendelian inheritance Mendelian ratio meniscus meroblastic cleavage merogones merozygote mesenchyme meso- mesomere messenger cascade messenger RNA (mRNA) Met meta- metabolism metacentric chromosome metafemale metal metallic bond metallothionein metaloid metamale metamere metaphase metaphase plate metaplasia metastasis methionine methylation Mg MHC MHC II micelle micro- microarray microbe microbial mats microglia microinjection micromeres micronuclei microplate microtubules midbrain midparent value migration mimicry minimal medium mismatch repair mismatch repair enzyme missense mutation mitochondria mitochondrial creatine kinase (mtCK) mitochondrial DNA mitochondrion mitosis mitosis promoting factor mitotic crossover mitotic spindle apparatus mixed codon family mixture mobile genetic element mock-infected mode modeling modifier gene molar mass molar solution molarity mole molecular biology molecular chaperone molecular diagnostic companies molecular evolutionary clock molecular formula molecular genetics molecular geometry molecular imprinting molecule monocistronic mRNA monoclonal antibody monoculture monoecious plant monogenic character monogenic trait monohybrid monohybrid cross monomer monoploid monoprotic acid monosomic monosomy morbid map morphogenesis morpholino oligo morpholinos morphological species concept morula mosaic mosaicism motor cortex motor neuron MPF MRI mRNA MS mtDNA mullerian mimicry multi-locus probe multihybrid multimeric structure multinomial expansion multiple allelism multiple-factor hypothesis multiple-hit hypothesis multiple sclerosis multiplex amplification multiplicity of infection (moi) murine mutability mutagen mutagenicity mutant mutant allele mutant screening mutant site mutation mutation breeding mutation event mutation frequency mutation rate mutational dissection mutational load mutator mutation muton Mycorrhizae myeloma myocardium myoclonic seizure myoclonus myogenesis myotonia myxamoeba
