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  Home >> Molecular Biology Dictionary >> Guain Residue - Gcap

G
Guanine residue in either DNA or RNA.

G cap
The 5' terminal methylated guanine nucleoside that is present on many eukaryotic mRNAs; It IS Joined, after transcription, to the mRNA.See cap

.Gall
A tumorous growth in plants.

Gamete
A mature reproductive cell which is capable of fusing with a cell of similar origin but of opposite sex to form a zygote from which a new organism can develop. Gametes have a haploid chromosome content. In animals, a gamete is a sperm or egg; in plants, it is pollen, spermatic nucleous, or ovum. gamete and embryo storage Storage of ova; sperm or fertilized. embryos outside their original source. Almost invariably this means cryopreservation in liquid nitrogen.

Gametic (phase) disequilibrium
In relation to any two loci, the occurrence of haplotypes (gametes) with a frequency greater than or less than the product of the frequency of the two relevant alleles. See also gametic (phase) equilibrium.

Gametic (phase) equilibrium .
In relation to any two loci, the occurrence of haplotypes (gametes) with a frequency equal to the product of the frequency of the two relevant alleles, e.g., loci A and B are in linkage equilibrium if the frequency of the haplotype (gamete) AiBi equals the product of the frequencies of alleles; Ai and Bi a.k.a. linkage equilibrium, but this is a misleading term, because the concept applies equally to linked and unlinked loci.

Gastrula
An early animal embryo consisting of two layers of cells; an embryological stage following the blastula.

G cap
See cap.

Gametoclone
A plant regenerated from a tissue culture originating from gametic tissue.

Gametogenesis
The process of, the formation of gametes.

Gametophyte
That phase of the plant life cycle that bears the gamete producing organs; the cells have n chromosomes. In angiosperms, the pollen grain is the male gametophyte and the embryo sac is the female gametophyte.

Gametophytic incompatibility
A phenomenon controlled by the complex S 1ocus, in which a pollen grain cannot fertilize an ovule produced by a plant that carries the same S allele as the pollen grain. Thus S1 pollen cannot fertilize an ovule of a plant of time, during the cell cycle, between M and S phases. 2. A missing section on one of the strands of double stranded DNA. The DNA will therefore have a single stranded region. Gapped DNA A duplex DNA molecule with one or more internal single stranded regions.

 

 

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