Looking for 90s book title - Pandemic cure causes sterility and children sex change. Plot: There is a pandemic. The cure causes selective sterility mother's must find fathers with different blood types to conceive a child. At puberty, males change to females or females change to males due to menstrual cycles.
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The initial plot was about genetic engineering being used to defeat disease, but something went awry that caused a massive social upheaval, where people in social settings would have a lapel pin or small badge that showed their blood type, so they could match up with someone compatible ( and not catch/cause a worse disease ).  An unknown effect of this genetic engineering was that newer children born turned into a sort-of hermaphrodite where they would physiologically switch genders under certain circumstances ( either puberty or pregnancy, I don't remember ).  The protagonist eventually adopted the surname Dos Caras ( meaning two-face or two-faced? ) and ended the story with a compatible mate.  All I remember of the antagonist was that he was a real ass, and regardless of the gender he/she was at the time, would flaunt the social custom of showing blood type in a gathering ( by wearing whatever blood type corresponding to the person he/she was interested in, and not his/her own ) just so he could 'sow his seed far and wide' to spread the genetic mutation that causes children to switch physiological genders.  The antagonist might have even died, by the end of the story, but that's one of the more fuzzier parts.
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Is it possible to have children in Skyrim?
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Please forgive the obvious question.   H2O2 vapor sterilization is deadly for the layperson but should be workable for hospitals. I can't find the small Chinese study I read the other day about it. Here are two more quickly googled sources.        2.
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Is there any evidence to suggest that cycling adversely affects male fertility?
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I have seen that there is a new edition of Pandemic for 2013.  What are the differences between Pandemic and the "New Challenge" version?  Can I convert my original edition to use any of the new rules?  Is the original Pandemic compatible with the 2013 expansion packs?
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My son was telling me about a book that he read last year in class that had a picture of a bee on the cover, but where its abdomen is a syringe (with the needle in place of a stinger). It was kind of post-apocalyptic where people were being driven insane by bee stings or something. Somehow he's not even sure of the major plot points. :)  Anyway, we would like to figure out the title and author of this book. Apparently it is fairly recent, and a second book in the series was released this year.
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This is similar to the .  So there are five cases, the gender of the children written according to their age,   GGGG GGGB GGBG GBGG BGGG   So the probability should be $\frac{4}{5}$. But the given answer is $\frac{3}{4}$.  Am I missing something?
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Scenario Pandemic's excess card rule states that if you have more than 7 cards in your hand at any time, you must discard the excess (according to your preference, of course). Let's say you're the Scientist, have 5 city cards and 2 special cards (like the airlift, or research center build card). The Researcher comes to town and gives you the remaining 1 color city card that will allow you to cure a disease as soon as you get to a research facility. Let's also say there's only two players (Researcher and Scientist). And that this is the last color that needs to be cured. This takes you to 8 cards - over the amount allowed. Question When do I, as the Scientist, need to play / discard my excess cards (in this case, let's take the two special cards as the ones to play) so I am not in violation of the excess card rule, but also so I maximize the value of the Researcher's endowment of city cards?  edited to reflect the limit of 7 vs 8, as noted by
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For every 104 male babies, we have 100 female babies and there are statistics which are more reliable. (Those tell us that we have 997 female infants born per 1000 male infants born.) What is the reason for that? Why do we have more male babies than female babies?
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This applies to most if not all reptiles, but I'll write about leopard geckos since that's what I know.  Incubation temperature of the eggs makes a big difference in the development of the gecko. Obviously excessively high or low temperatures will kill the embryo, but inside the safe temperature range there are some interesting effects. The most well-known is Temperature-Dependant Sex Determination (TDSD).  Studies have been done and it is quite well-documented that:   Incubating eggs at the mid-point of the safe range results in predominantly male offspring. Incubating eggs at the high or low end of the range both result in predominantly female offspring.   According to my gecko book, there are also some interesting effects regarding males that hatch from female-biased temperatures being more sexually active but less aggressive to females than the "macho" males produced at male-biased temperatures, females at female-biased temperatures being the most fertile and high-temperature females being more aggressive than lower-temperature females.  (Incubation temperature also affects colour - specifically melanin production levels. AFAIK it's not known whether this is a direct effect of the temperature or an indirect effect from the changes in sex hormones at the different temperatures. It's probably a different enough issue to warrant a separate question, though.)  Going back to TDSD, my question is: what theories have put forward to explain this sex determination? Evolutionarily speaking, how did this come about? Are males less likely to survive so they are only produced at safe temperatures? Does the optimal male:female ratio for propagating the species change in adverse conditions?  I'm not looking for random guesses. I'm interested in knowing if there have been any theories put forward from knowledgeable and reputable sources.
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I read this series when I was younger but cannot remember the name to save my life. I remember a species of Aliens saves humanity from the ashes of an apocalyptic nuclear fallout and in the resulting event humanity is rendered essentially sterile.   The species has three genders: male, female and ouloi. The ouloi are required for humanity to procreate.   That is all I remember of it.
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The book features multiple parallel story lines:   a poor child accidentally ends up possessing an AI driven book; the voice for the AI is crowdsourced to a woman, who gradually figures out that she's involved in helping out the child; genetic engineering is pervasive, and various factions of society spread viruses into the air as a way to fight wars, communicate, etc... Membership in a subsection of society buys you protection from the viruses; if you're not protected, you can end up severely damaged or otherwise not autonomous; some of the story line features a mysterious religious sect which subsume their consciousness to a collective, which performs some sort mysterious, of massively parallel computation, possibly using its members' brains; they form their habitats under water for cooling purposes.
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What are the mechanical/strategic differences in playing Pandemic Legacy: Season 1 with just two characters, as opposed to three or four?  If discussing Season 1 spoilers is unavoidable, please remember to use the spoiler notation (&gt;! hidden text) and clearly mark them.
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Can ACE2 be produced and used as drug against covid? I read it is the receptor molecule. If it is in the organism the virus should bind to it and could not attack cells anymore? Is that right?
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A scientist creates a virus (bacteria?) which, when encountering a woman, implants a fetal clone of him, which the woman is pregnant with.  Millions of his clones have already been born, and society is having a hard time accommodating them.  The man is in hiding, working as a teacher in a special class for his clones.  He is evaluating one particular young clone, who apparently suffered from fetal alcohol syndrome, which was detected based on his unexpectedly low test scores.  It's a short story, read in the 2000s or earlier.
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I remember reading a story once where we had all interbred such that there were no longer any blacks, whites, Asians, etc.  We were all 'brown'.  Somehow they 'found' 5 children that were purebred 'races', and I don't remember much else.
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Does anyone remember the title and/or author of a sci-fi book about single-celled organisms that ended up saving the life of some astronauts?  The organisms launched a mission into space and fixed something in the astronauts spaceship.  The book dealt extensively with the concept that time passes much more quickly for single-celled organisms.  I read it in 1984.