Word: x
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Dates: during 1950-1959
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...State University has succeeded in partially controlling the sex of unborn rabbits. His system depends on the fact that when a mammalian ovum is fertilized, the sex of the individual into which it will develop is determined by the sperm that does the fertilizing. Half the sperm cells have X chromosomes, which produce females. The other half have Y chromosomes, which produce males. So a way to start to control sex might be to separate the sperm cells into X and Y fractions before insemination...
...Gordon accomplished it while working at the University of California in Berkeley. The two kinds of rabbit sperm cells look exactly alike, but there is nevertheless a slight difference between them. Dr. Gordon believes that the protein that coats them may not be identical. At any rate, the X and Y sperms behave differently when a gentle electric current is passed through a solution in which they are suspended. Under favorable circumstances, the X (female) sperms move toward the positive anode, and the Y (male) sperms move toward the negative cathode...
When the two kinds of sperm have separated as completely as possible, Dr. Gordon collects them and uses them to inseminate female rabbits. When left to themselves, rabbits produce about half males, half females, but the rabbits that Dr. Gordon inseminated with X sperm produced 80% females. His success in producing males was not quite so good, but in all seven cases where all the rabbits in a litter were of the same sex, that sex was the one Dr. Gordon intended...
...estimate that the American League has had the better team a fraction of the time x, we can recall that up to 1951 this league had won 31 of 48 Series. Then, the equation 0.80x + 0.20 (1-x)=31/48 must tell us that x...
...very remarkable about this location, which is somewhere between Harry's Arcade and Hyman Pill's hardware store. That is, there is nothing remarkable about it at the present time. For but a few short months ago an unusual store was opened at that location. The store was "The X-Mas Outlet." It was a very nice store even if the idea of cut-rate Christmas has certain sentimental drawbacks. There were shiny cars and golden-haired dolls and smiling, happy salesmen. All this joy was, of course, to be fleeting. The foreshadowing of doom was a bold sign that...