15th World Conference on Human Genomics and Genomic Medicine

  Identical twins, also called as monozygotic twins, are created when a single egg and sperm pair separates a few days after fertilization . Because their DNA comes from a single source, their genetic composition is same, and their genetically determined qualities will be similar. Except in exceptionally rare situations of chromosomal defects, monozygotic twins are invariably of the same gender. Fraternal, or dizygotic, multiples, on the other hand, occur when two different eggs are fertilised by two separate sperm in a single ovulation cycle . They share around half of their specific genes in a unique combination of genes from both parents, much like any other sibling group. The stereotype about identical twins is that they have been identical in every way: they appear alike, dress alike, and have comparable likes and dislikes. Parents with identical twins, on the other hand, know much better. Despite their genetic similarity, identical multiples are separate group. They have a ...

  A gene mutation is a change in one or more genes (myoo-TAY-shun). Some mutations can cause genetic diseases or conditions. Changes in single DNA bases, as well as minor intragenic deletions and rearrangements, are instances of gene mutations. Gene mutations and point mutations are often used interchangeably, despite the fact that they are genetically distinct events. Single base alterations, insertions or deletions of one or a few bases are known to as point mutations, whereas gene mutations are defined as intragenic additions, deletion, or rearrangements that affect normal gene function. Because these effects are usually not deadly to the exposed cells and are often detected in the following surgery generation cells, they are all considered heritable effects. The mutations must be expressed and scored in the treated cells during subsequent reproductive cycles. New (gene expression) variation is genetic alterations that are discovered in a kid but not in either of its parents...