Unusualsuspect said:
leonurgle said:
Hey! You don't remeber a thing: Space Marine are created by the Emperor, and He used His genetic material! The Emperor is a male, then the Astarten can be only male! Stop! This is BG and no one can't say other... So this is the tecnical impediment to Female Astartes!
His genetic material would include an X and Y chromosome, assuming he was genetically human. Women are XX. If he's using technology capable of creating super-godlike-clones-of-awesomeness, he's capable of doubling his Xs to make a woman.
The only problem is that the genes that trigger the development of prefferred characteristics (like increased muscle growth, high testosterone levels and increased aggressiveness) in space marines recide in Y-chromosome. This is, by the way, true for all mammals. For example, the reason why beef comes from ox not cow is because due to Y-chromosome the ox gather much more muscle mass much faster and thus make better beef. This is also the reason why at highest levels of muscle-strenght-oriented sports men get better results than women. Hard training can make anyone tough, but when everyone trains hard genetics start to make serious difference.
Emperor may be several things, but he is not stupid. Thus, when creating space marines he chose Y-chromosome instead of XX simply because he knew Y-chromosome already carries all the preferable traits his warriors will need. All he has to do is to the best of them and enhance them to superhuman levels.
Now, here comes the catch: In addition to making humans bigger, stronger, more aggressive and make them grow cojones Y-chromosome does come with a rather nasty disadvantage. Its carriers are particularly susceptible to mutations. This is because if in XY setup (men) if a gene in the Xs or the Y gets mutated there is no backup. Whereas XX setup (women) always have identical backup in the other X if a single gene (or a sequence) in the other X gets damaged.
The lesson of the story: If you want to make big, badass warriors, choose men.
If you want to make not-so big, not-so-badass people less easily corrupted due to mutation, choose women.
Ever wonder why Emperor guided the things in such way that the keepers of purity (Daughters of Emperor) were all-female organization?
Ever wonder why space is filled with chaos/renegade/just-plain-gone-strange marines?
) this is another thing, but is a heresy!