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  Home >> Molecular Biology Dictionary >> Incomplete Dominance - Inheritance

Incomplete digest.
See partial digest.

Incomplete dominance
A type of gene action in which heterozygotes have a phenotype that is distinctly different from, and intermediate to, the homozygous phenotypes. See heterozygote; phenotype

Incomplete penetrance
When some individuals in a population have a specific genotype that causes an abnormality but are not affected.

Indehiscent
Describing a fruit or fruiting body that does not open to release its seeds or spores when ripe.

Independent assortment

The random distribution of allele (from different loci) to the gametes that occurs when genes are located in different chromosomes or far apart on large chromosomes. The distribution of alleles at one locus is independent of other the distribution of alleles at another locus. cf linkage.

Indeterminate growth
1. Unlimited growth potential for a definite or indefinite period. Some apical meristems can produce unrestricted number of lateral organs. 2. In legumes, used to describe plant architecture.

Indirect embryogenesis
Embryo formation on callus tissue derived from zygotic or somatic embryos, seedling plant or other tissues in culture cf direct embryogenesis.

Indirect organogenesis
Organ formation on callus tissues derived from explants. inducer A low molecular weight compound or a physical agent that is bound by a repressor so as to produce a complex that can no longer bind to the operator; thus, the presence of the inducer turns on the expression of the gene(s) controlled by the operator.

Inducible
A gene or gene product is said to be inducible if its transcription or synthesis is increased by exposure of the cells to an effector. Effector are usually small molecules whose effects are  specific to particular operons or groups of genes. See constitutive.

Inducible gene
A gene that is expressed only in the presence of a specific
metabolite, the inducer.

Induction
(L. inducere, to lead in) Act or process of causing to occur; process whereby a cell    or tissue influences neighbouring cells or tissues. Turning on transcription of a specific gene or operon. Getting an organism to make a protein by exposing it to some stimulus induction media 1. Media used to induce the formation of organs or other structures.
2. Medi causing variation or mutation in the tissues exposed to it.

Inembryonation
See artificial inembryonation.

I/E region
See integration excision region.

Inheritance
The transmission of particular characteristics and/or genes from generation to generation.
Initial
Noun: Cells in a meristem that remain permanently meristematic and form tissues of particular structure and function.

 

 

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