/sci/ - Science & Math

I read something that sounded silly, but brought up an intriguing idea. It said the zygote would attatch to the male's seminal vescicle, and alter the person's RNA to that of the woman who provided the egg.

Then it stated that over a short period of time, it would turn his male sex organs into a uterus, ovaries and Fallopian tubes, while his new RNA would alter every cell in his body until he had become a pregnant female. It sounds impossibru, but it makes me curious. Since I couldn't find any sciency place with degrees and medical research to back up their ideas, I decided asking /sci was in order.

What does /sci think of artificially inseminating embryo's in a small home lab without any registration with local/federal governments in an attempt to cultivate/harvest/study and eventually graffe into other living tissues.

Please observe outside the scope of ethical and or moral convictions. Has anyone here tried? What hypotheses do you have on the outcome/ viability of such an endeavor?

Question on sex allocation ratios in humans

Many organisms have the "ability" to determine the sex of their offspring. Certainly those that lay eggs, but there is circumstantial evidence for some mammals as well. The prevailing thought is, females can marry up, because eggs are expensive, and males are expendable, because sperm is cheap. Thus the fitness of the mother is a function of the opportunity for grandchildren in relation to either sex. Actually, its a function of the opportunity for great grandchildren.

N = number of expected mates, s = number of expected offspring, p(s) = probability of survival to maturity

The fitnesses for males or females:

W(m) = N*s*p(s) - C, W(f) = N*s*p(s) - C

C = variable cost to each

Now if W(f) > W(m), probably a scenario where p(s) is considerably higher in females than males, and Cost is lower, then the tradeoffs between having males vs females becomes a factor.

Now, the US census is typically 53% of population is female, 47% male. Understanding that randomness ultimately surrounds the meiotic sex-chromosome lottery (you get either an X or a Y), and in this scenario, disregarding the possibility of meiotic drive, do you think it possible, there is some mechanism during either the post-fertilization stage (contingent zygote abortion), or pre-zygotic stage, that "controls" the sex of the embryo in humans. Or is it just the nature of an equiprobable lottery?