Thread: What would happen if you created offspring by splicing sperm together?

Considering that it's theoretically possible to create a female using two eggs, consisting of an X-X coupling and considering that males consist of an X-Y coupling.
Then what would come of splicing two sperm together, resulting in a Y-Y coupling?

The Y chromosome is missing DNA (chromosomes) found only on the leg of the X chromosome. Theses chromosomes are essential in the formation of a complete organism. A Y-Y pairing blastocoel (early embryo) would probably not survive.

either, it would not survive, or it would be one entertaining experiment.

First of all, as has already been said, a mammal lacking both X chromosomes would die pretty fast - probably in utero.
Second, I remember someone did an experiment with mouse zygote having both maternal nuclei and both paternal nuclei and the outcome was bleak in both cases... all-maternal embryos were large with underdeveloped placenta and chorion, whereas all-paternal embryos were small with huge fetal annexes. Neither were carried to term. Google 'genomic imprinting' for detail.

It was once thought that the presence of two Y chromosomes in an individual (XYY) made him a criminal. This is no longer considered likely, although XYY individuals exhibit mental retardation to some extent. Was this the outcome you were looking for?

The X chromosome is huge.... there is a LOT of necessary genetic information on it. The Y chromosome, on the other hand, is very small; there really isn't too much on it. There is so much on the X chromosome, that an embryo with only a Y chromosome will not survive; it will die before too long. Humans absolutely need the X chromosome.

However, it is possible for a female to be born with just one X chromosome. This is called Turner Syndrome, and the female has only one X. The X is big enough to do the job on it's own, but women with Turner's Syndrome tend to be underdeveloped and are sterile.