It was recently revealed that there is case that one egg being fertilized by two sperm simutaneously, with the resulting zygote alive! So in this case, the resulting zygote would be triploid, differing from the normal diploid zygote, in which case that normally the triploid zygote would be dead. It is claimed that after the egg is fertilized by two sperms, it divides to two balls of cell, forming two zygotes, let the two sperms as a and b, one of the zygotes possesses the gene set from its mother and that of a; while another zygote possesses, again the gene set from its mother, and that from b. So now I wonder how this could be done, the zygote formed is triploid, and the chromosomes from each sperm should have been mixed, while two zygotes with exact chromosomes from either sperm and the egg are formed, how could exact chromosomes from one sperm be extracted from the mixed chromosome forming zygotes possessing exactly chromosome from one sperm and the egg?

reference?

reference?

 

the original version I read is in chinese:

http://hk.news.yahoo.com/070327/12/24i6e.html

while I later find an English version:

http://science.slashdot.org/article.pl?sid=07/03/27/2059230&from=rss

i think he might be talking about this story -> Semi-Identical Twins Found

 

edit; awww, i was too late