A coin left on a headstone letâs the deceased soldierâs family know that somebody stopped by to pay their respect. Leaving a penny means you visited. A nickel means that you and the deceased soldier trained at boot camp together.If you served with the soldier, you leave a dime. A quarter is very significant because it means that you were there when that soldier was killed.ead more, so you can know what each coin means, and maybe as you visit a fallen soldier this Memorial Day, you can leave a coin to honor them too. According to snopes.com these meanings vary depending on the denomination of coin:
Zygosity of fraternal and identical twins. Zygosity refers to the similarity between the genomes of each twin. Fraternal twins are dizygotic, meaning that they developed from two different eggs fertilized by two different sperms. Their genetic code is as similar (or dissimilar) as any other siblings. Identical twins are monozygotic, meaning that they developed from the same fertilized egg, and so have nearly identical genetic code. They almost always have the same gender and many of the same physical characteristics (phenotypes).
Because you and your sister are identical twins, you pretty much have the same DNA. Not exactly but pretty darned close. This is because you both started from the same fertilized egg. Which is why identical twins are also called monozygotic. Since you both have the same DNA, this is almost like the two sets of children have the same moms but different dads. In fact, this is why at the DNA level they are really more like half siblings instead of first cousins.