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Identical twin
- Twins produced by the division of a single zygote; both have identical genotypes.
See also:
fraternal twin
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Immunotherapy
- Using the immune system to treat disease, for example, in the development of vaccines. May also refer to the therapy of diseases caused by the immune system.
See also:
cancer
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Imprinting
- A phenomenon in which the disease phenotype depends on which parent passed on the disease gene. For instance, both Prader-Willi and Angelman syndromes are inherited when the same part of chromosome 15 is missing. When the father's complement of 15 is missing, the child has Prader-Willi, but when the mother's complement of 15 is missing, the child has Angelman syndrome.
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In situ hybridization
- Use of a DNA or RNA probe to detect the presence of the complementary DNA sequence in cloned bacterial or cultured eukaryotic cells.
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In vitro
- Studies performed outside a living organism such as in a laboratory.
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In vivo
- Studies carried out in living organisms.
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Independent assortment
- During meiosis each of the two copies of a gene is distributed to the germ cells independently of the distribution of other genes.
See also:
linkage
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Informatics
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See:
bioinformatics
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Informed consent
- An individual willingly agrees to participate in an activity after first being advised of the risks and benefits.
See also:
privacy
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Inherit
- In genetics, to receive genetic material from parents through biological processes.
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Inherited
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See:
inherit
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Insertion
- A chromosome abnormality in which a piece of DNA is incorporated into a gene and thereby disrupts the gene's normal function.
See also:
chromosome, DNA, gene, mutation
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Insertional mutation
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See:
insertion
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Intellectual property rights
- Patents, copyrights, and trademarks.
See also:
patent
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Interference
- One crossover event inhibits the chances of another crossover event. Also known as positive interference. Negative interference increases the chance of a second crossover.
See also:
crossing over
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Interphase
- The period in the cell cycle when DNA is replicated in the nucleus; followed by mitosis.
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Intron
- DNA sequence that interrupts the protein-coding sequence of a gene; an intron is transcribed into RNA but is cut out of the message before it is translated into protein.
See also:
exon
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Isoenzyme
- An enzyme performing the same function as another enzyme but having a different set of amino acids. The two enzymes may function at different speeds.
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