Boundaries of the I-Function in Twins :: Biology Essays Research Papers

Boundaries of the I-Function in Twins Identical, conjoined, and half- tally are exclusively examples of inalienable variability in humans. Intrinsic variability exists in altogether animals and is an adaptive mechanism built into the nervous system in repartee to input. This mechanism allows humans to distinguish the same inputs as different from angiotensin-converting enzyme a nonher and therefore, the possible outputs vary with time. It is possible that due to identical familial input, the twins could share identical neural pathways and identical I-Functions. This hypothesis could apologise the identical behaviors and inter-connectedness of feelings and thoughts that twins share. Differences that are seen in twin behaviors could simply be due to intrinsic variability causing differing output or behaviors.During ovulation, when a woman releases an ovum, three different processes can occur. First, the ovum can remain in one piece all the way to the uterus where, if not fertili zed, it will be shed out of the luggage compartment along with the unwarranted endometrium. Second, the ovum, if fertilized, can develop into a single embryo, which is the most common theatrical role of pregnancy in humans with about 99% of all births be singletons (1). Finally, the ovum can split into 2 separate halves resulting in genetically identical twins. The three types of twins previously mentioned are identical, which are created when the fertilized ovum separates into two complete, identical move, conjoined, which occur as a result of a fertilized ovum not completing the equal separation resulting in two fetuses fused together in some way, and half-twins or polar body twins, which are made when an unfertilized ovum splits into two complete, identical parts and is then fertilized by two different sperm. The frequency of identical twins is 3.5 per 100 births (1) and the frequency of conjoined twins is 1 birth per 50,000 with still 100 known cases surviving their first year (5). There is no scientific explanation for why an ovum splits into two or more than parts. It has been observed that ovum splitting can be hereditary scarce can also occur spontaneously. This spontaneity or unexplained disagreement from normal egg growth and fertilization could be due to intrinsic variability. This intrinsic variability could also be connected to certain differences in behavior of two genetically and culturally identical twins. Ideally, one could imagine that twins with identical genetic information and environments would have extremely similar, if not the same neural pathways and central pattern generators (CPGs).