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Ectopic expression is an abnormal gene expression in a cell type, tissue type, or developmental stage in which the gene is not usually expressed. [ 1 ] [ 2 ] The term ectopic expression is predominantly used in studies using metazoans, especially in Drosophila melanogaster for research purposes.
Promiscuous gene expression (PGE), formerly referred to as ectopic expression, is a process specific to the thymus that plays a pivotal role in the establishment of central tolerance.
Gene conversion is the process by which one DNA sequence replaces a homologous sequence such that the sequences become identical after the conversion. [1] Gene conversion can be either allelic, meaning that one allele of the same gene replaces another allele, or ectopic, meaning that one paralogous DNA sequence converts another.
Ectopic recombination is an atypical form of recombination in which a crossing over takes place between two homologous DNA sequences located at non-allelic chromosomal positions. Such recombination often results in dramatic chromosomal rearrangement , which is generally harmful to the organism. [ 1 ]
Ectopic enamel, a tooth abnormality, where enamel is found in an unusual location, such as at the root of a tooth; Ectopic expression, the expression of a gene in an abnormal place in an organism; Ectopic hormone, a hormone produced by a tumor, such as small-cell carcinoma, can cause Cushing's syndrome
Behavioural genetics, also referred to as behaviour genetics, is a field of scientific research that uses genetic methods to investigate the nature and origins of individual differences in behaviour.
The actress did not further elaborate on her ectopic pregnancy, which occurs when a fetus grows outside the womb (usually in a fallopian tube instead of the uterus). The fetus is unable to survive ...
Down syndrome is a genetic syndrome marked by intellectual disability and distinct cranio-facial features and occurs in approximately 1 in 800 live births. [17] Experts believe the genetic cause for the syndrome is a lack of genes in the 21st chromosome. [17] However, the gene or genes responsible for the cognitive phenotype have yet to be ...