Saturday, November 25, 2006
zac and i went out ystd and today. today was to celebrate our 1yr 6months together n look for violins.yea im planning to learn violin.
above: zac trying out a suit for prom night.lol.sooooo man ah!
above: us at vivo city.i look bad.but zac looks nice.
above:how do i look? im seriously considering that dress for prom.so classy n elegant looking.and i look great. =)) makes me look tall.or maybe im just too slim.
above: nice heart.it's on a pen that zac bought for me.so sweet.thanks baby.
above:us.haha!zac cant open his eyes cuz of the glaring sun but i have sunglasses! it was waaaaay brighter than it looks.
8:29 PM
Saturday, November 18, 2006
zac and i were just dicussing about differences in fingerprints of identical twins, like why do twins have different fingerprints. wow we have such intellectual discussions.anyway,the truth is that twins' fingerprints are more than 90% similar. u may wonder that the DNA makeup of twins shld be identical, so where did the differences come from? after doing research, the answer lies in the microenvironment of the foetus in the amnotic bag of the mother. Fingerprints and physical appearance in general are part of an individual’s phenotype, which arises from the interaction of the individual’s genes and the developmental environment in the uterus. In the case of fingerprints, the genes determine the general characteristics of the patterns that are used for fingerprint classification. As the skin on the fingertip differentiates, it expresses these general characteristics. However, as a surface tissue, it is also in contact with the amniotic fluid in the uterus. The fingertips are also in contact with other parts of the fetus and the uterus, and their position in relation to uterus and the foetal body changes as the foetus moves on its own and in response to positional changes of the mother. Thus the microenvironment of the growing cells on the fingertip is in flux, and is always slightly different from hand to hand and finger to finger. It is this microenvironment that determines the fine detail of the fingerprint structure. While the differences in the microenvironment between fingers are small and subtle, their effect is amplified by the differentiating cells and produces the macroscopic differences that enable the fingerprints of twins to be differentiated.
Also, changes in the DNA could occur after the fertilized egg splits. Any difference in DNA between identical twins is much, much less than any difference between unrelated people but depending on where the difference is, visible phenotypes, like different fingerprints, may result. It's more likely that environmental influences play more of a role. Depending on the positioning of the foetuses and the in utero experience, the folding/forming of the fingerprints may be different.
uh if u dont know what terms like phenotype and stuff, go look it up on ur own.lol.too lazy to explain.
so..yea.here u go. fascinating isnt it? =)
