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Birth Defect - Genetic
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Birth Defects - Genetic | |
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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 loated 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. The DNA is the basic unit of heredity and is known as the blue print of life.It carries the genetic codes which stores the necessary information for all organisms. 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 enviornment 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. |
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Posted by:
honnet
Posted on: 03/16/2011 The Content/ remarks were helpful. From http://www.hyderabadonnet.com
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| News on Birth Defect - Genetic |
| * Chances of Birth Defects With Assisted Reproductive Technologies |
| * Hike In Birth Defects Due To Assisted Reproduction |
| * Scientists Discover Reason Behind Chromosome Number of Sperm and Egg |
| * Scientists Unveil The Cause Behind Birth Defects |
| * Study Says Pregnant Diabetics More Prone to Birth Defects |
| Total News Item 163 |
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