G – I

G0 phase
G0 phase is a time when a cell will leave the cycle and quit dividing. This may be a temporary resting period or more permanent.
G1 phase
G1 phase is a 1st gap phase, as no DNA synthesis. 1st growth phase as synthesis of RNA, proteins, membranes occur in this phase.
G2 phase
G2 phase is second gap or second growth phase of interphase.
Gametic meiosis
Meiosis which occurs before formation of gametes is called as gametic meiosis.
Gametophytic Self-incompatibility
Gametophytic Self-incompatibility is a type of self incompatibility controlled by genetic constitution of gametes.
Geitonogamy
Geitonogamy is the phenomenon in which pollen grains are transferred from anthers to stigma of the same flower or another flower of same plant.
Gene
Sequence of nucleotides which code for a functional product of RNA or a polypeptide (protein) is called gene.
Gene interaction
This condition where a single character is governed by two or more genes and every gene affect the expression of other genes involved (means these genes affect each others expression) is known as gene interaction
General combining ability
General combining ability is an average performance of a individual in a particular series of crosses.
Genetic diversity
Genetic diversity is the sum total of genetic characteristics in the genetic makeup of a species.
Genetic engineering
Genetic engineering is a technique that alters genes or gene combinations in living organisms by cutting apart and splicing together different pieces of DNA.
Genetic Male Sterility
Genetic male sterility is a type of male sterility which is governed by nuclear genes, in most of the cases by single gene.
Geneticists
Scientists those study heredity, variation are called geneticists.
Genetics
Genetics is a branch of biology which studies heredity and variation.
Genotype
Assembly of genes possessed by an individual (organism) is called as its genotype.
Germinal crossing over
When crossing over occurs during meiosis, it is called as germinal crossing over.
Germination
Germination is the resumption of growth of the embryo plant inside the seed.
Green Biotechnology
Biotechnology which is applied to agricultural processes is called as green biotechnology.

Gymnosperms
Gymnosperms are a group of seed-bearing plants which bear seeds on cone-like structures rather than inside fruit like angiosperms.
Haploids
Individuals with gametic chromosome number of a species are called as haploids.
Haploidy
Haploidy (haploids) represent gametic chromosome number of a species irrespective of whether it is diploid or polyploid species.
Heredity
Heredity is the transfer of characters from parents to offspring generation after generation and hence responsible for biological similarity between them.
Heritability
Heritability is the variation which is transferred from parents to their offspring.
Heterobeltiosis
When heterosis is estimated over better parent it is called as heterobeltiosis.
Heterochromatin
Heterochromatin are the portions of chromosome with tightly packed DNA, always remains in the condensed state and stain dark.
Heterogeneous
Genetically dissimilar plants make up heterogeneous population.
Heteromorphic self incompatibility
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