DNA - Deoxyribonuclic acid, the chemical name for the molecule of inheritance that directs the growth, organization, development, and function of cells. DNA is found in virtually every cell of every living organism.

Inherited Disorder - A disease caused primarily by changes in a person's DNA, inherited from the parents, rather than some infectious agent or environmental influence.

Semen - Thick, whitish fluid containing sperms that is discharged through the penis during ejaculation.

Mosaic – An individual with two cell types or more, comprising of different chromosome number or structure.

Genetic Counselling - A communicative procedure that undertakes to deal with the problems that rise in a family with the occurrence or the risk of occurrence of a genetic abnormality.

Pedigree - A pedigree involves recording a family’s history and making use of a standard set of symbols to represent the status of each member of the family.

Allele - An allele is an alternative form of a gene located on a given locus of a chromosome.

Gene – Genes are located on the chromosomes and carry the information representing a protein.

Chromosomes - Chromosomes are structures made up of DNA and proteins found in the cells of all organisms.The number of chromosomes is species- specific. In humans it is 46.

Genotype - Genotype indicates the genetic constitution of an organism.

Phenotype - Phenotype refers to the physical appearance of an organism which is controlled by the genotype and the environment.

Haploid Cell - A cell having only one set of chromosomes, ie.23 numbers in humans.

Diploid Cell - Having two sets of chromosomes, 46 numbers in humans.

Hybrid - An offspring of parents belonging to two different species, example mule which is the offspring of a horse and donkey.

Mutation - An inheritable change in the gene or the chromosome.

Wild Type - An organism having a normal phenotype.

Mutant - An organism harboring a mutation.

Trisomy - A condition , which arises due to the presence of an extra chromosome.An example is Down syndrome, where the individual has an extra chromosome 21.

Mitosis - A division by which the cells reproduce, wherein the resultant cells are the replica of the parent cell.

Meiosis - A special kind of cell division, called reduction division, that takes place in the testes and the ovaries, which produces eggs and sperms that are haploid.

Consanguinous marriage - A marriage between two closely related individuals.

Euploidy - When an organism has the regular chromosome number, example 46 numbers in humans, it is euploid.

Aneuploidy - When an organism has an abnormal number of chromosomes as in Down Syndrome, it is known as aneuploidy.


Shivani17 Tuesday, August 30, 2011

why do we use VNTR's inspite of bulk DNA ? How VNTR's are related to introns ?

qq101 Wednesday, June 16, 2010

dna can detect criminals such as stealing and more

guest Wednesday, June 23, 2010


dimple payal Wednesday, November 26, 2008

please tell me method of dnafingerprinting or its mechanism...

guest Wednesday, August 19, 2009

DNA fingerprinting uses electorphoresis, very basically samples are put into aragose gel, through which a current is passed causing the samples to move through the gel. the smaller parts of DNA move faster so the DNA sample is broken out into bands according to its makeup, the bands of different DNA samples can then be compared. i think that is right, if you search gel electrophoresis there a few sites that can tell you more

guest Tuesday, May 15, 2007

Which situations[ biological]donot permit to implement DNA analysis/fingerprinting? That is even the cells are dead [ recent or thousands of year old-Mummy],can DNA be extracted and evaluated?

guest Thursday, January 8, 2009

what does a mummy have to do with anything??

qq101 Wednesday, June 16, 2010


Most Popular on Medindia