What is the reason for sexual reproduction using separate sexes?

Question

The genetic code can still give variation with hemaphrodite reproduction which most (but not all) plants use Most animals (but not all eg snails, use sparate sexes) Would it be great if we were all hemaphrodite, no gays, no sexual discrimination!

Answer 1

Two potentially unresolved questions in evolutionary biology are how and why did sex evolve (the big unresolved issue), and why only two as opposed to more sexes is stable. theory allegedly predicts three is more stable and better than two for example.

Your text book anwsers, like recombination to break the linkage between "good" and "bad" genes and to avoid parasites (red queen hypothesis) explain why sex, ONCE it has evolved, is stable and selected for, BUT not how or why it evolved.

Perhaps you should consider work by Lynn Marguilas et al. on the symbiont theory. Although now largely accepted that organelles like the mitochondria and chloroplast are degenearte symbionts, and less accepted that the nucleus is too, extrapolation of this theory would allow (account for) for the evolution of diploidy and reductive meisois (and thus sexual reproduction) by having two organisms (one aerobic the other anerobic) merging and seperating according to the oxygen levels (oxygen was at first a highly toxic compound to life untill aerobic metabolism evolved).

By the way hemaphrodites are still sexual, even selfing ones.

And additionaly please note and remember for future that sexual discrimination, like homosexual discrimination, and so on, is neither a prerequisite nor a product of sexual reproduction.

Answer 2

...by the same token why aren't we all the same race so there'll be no racial discrimination...

But then again, you can't have as much fun reproducing by spawning little bits of yourself. And what would advertisers exploit when they're trying to sell things? Use images of amoebas cells splitting?

Answer 3

using seperate gamete only we have to mate .in otherwise both are producing same gametes.in human and animals seperate sex is formed by its modifications in the body.this modifications later can fuse with each other.

Answer 4

duh!@!!! how will fusion occur!! widout the opposite gametes merrging to giv a zygote

Answer 5

TO CONTINUE THE EXISTANCE OF HUMAN LIFE ON EARTH.

Answer 6

Well... what would we commonly look like though?