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Apr
18
revised Can I figure out the identity of my grandparent from this information?
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Apr
18
answered Can I figure out the identity of my grandparent from this information?
Oct
25
awarded  Notable Question
Oct
22
comment Is there any possible way to take a DNA test without using blood in humans?
en.wikipedia.org/wiki/Blood_residue nejm.org/doi/pdf/10.1056/NEJM194910062411414
Oct
20
comment Is there any possible way to take a DNA test without using blood in humans?
For a cheap and fast test of blood groups, you need blood. Unless your fingerprint has it's owner's blood, this gets more difficult. In principle, you could extract DNA (caligari2005 already explained that is bothersome) and then check the DNA sequence for the blood group alleles. But if you did extract the DNA from a fingerprint, you would have much better individuation chances with standard forensic tests than looking for a blood group allele.
Oct
19
comment How many people are required to maintain genetic diversity?
Dan Horvat's scenario is only theoretically feasible. People have, on average, 15 damaged genes that may lead to a deadly disease. The first couple (and next generations, too) would have to produce lots of children in order to give them a good chance of findinf couples who can have healthy children. Much more likely this scenario would result in a population with uncommon genetic diseases being common, like in Finland (which artificially created a series of bottlenecks from the 17th century, a fascinating story), read more here: cs.sjsu.edu/~khuri/Aalto_2010/Norio_2003.pdf
Oct
19
comment How many people are required to maintain genetic diversity?
Actually, that's a much more complicated case. The short answer is: you can't be completely certain you've culled the recessive allele. You can diminish it's frequency and this has been done in a neat way in the Mediterranean with thalassaemias (a group of diseases related to sickle cell anemia) - young couples with non-negligible risk were tested and if both carried the gene, they were advised against having children or given access to abortion if the fetus turned to be sick. Given stricter control, reduction could be achieved fasted, but when the allele becomes rare, it gets more difficult.
Oct
19
comment How many people are required to maintain genetic diversity?
Have you considered women's point of view? That in this scenario somebody decides to use a woman's body to generate some number of children and you cannot decline, you are literally forced into pregnancy? Pregnancy and childbirth, which, even with modern medical advancements, are an important cause of death for women? I guess the people who board such a ship can make this kind of a decision, but their children would not be given any choice with regard to bearing a second generation.
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21
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21
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19
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Feb
16
accepted How do scientists decide which version of a polymorphism is the main one?
Feb
13
accepted Why does yawning impair hearing?
Feb
13
asked How do scientists decide which version of a polymorphism is the main one?
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Jul
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Feb
15
comment Dinuclei cellular mechanism
I hope it's better now.
Feb
15
revised Dinuclei cellular mechanism
clarification, by request
Feb
13
answered Dinuclei cellular mechanism