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visits member for 1 year, 3 months
seen Apr 21 at 12:22

I am currently working towards a PhD in microbial genetics. Before that I spent a bit over a decade working as a programmer, with most of that time spent writing computer games. I have degrees in Mathematics (MMath), Life Sciences (BSc) and Molecular Genetics (MSc).


Jul
27
comment Why isn't a virus “alive”?
@nico: I disagree: a cell is never simply a piece of DNA, it always has membranes, organelles, proteins, etc. The division of mother->daughter is not the creation of a novel cell de novo from DNA but rather a process of growth followed by division. Even DNA replication is semiconservative - both copies are one part original, one part newly synthesized so neither can really claim to be more original than the other.
Jul
26
answered Why isn't a virus “alive”?
Jul
15
comment How to obtain bacteria samples at home?
I think this answer needs some information about safe disposal. I don't think you should be growing bacteria without knowing how to get rid of them safely.
Jul
12
comment What does “fit” mean in “survival of the fittest”?
A book on the philosophy of evolution I read a while back. I don't have it to hand to give you a reference.
Jul
12
answered What does “fit” mean in “survival of the fittest”?
Jul
4
answered Mitochondrial DNA and recombination
Jun
29
reviewed No Action Needed Why does the apex of the human heart usually point to the left?
Jun
27
awarded  Revival
Jun
26
answered Could humans and chimpanzees hybridize?
Jun
26
comment Possibility and feasibility of producing designed antibodies with bacteria
Today, I fail at reading.
Jun
26
revised Descendants of dinosaurs
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Jun
26
revised Descendants of dinosaurs
added 212 characters in body
Jun
26
answered Descendants of dinosaurs
Jun
19
comment Are human males and females more genetically different than members of other species?
Almost. Because genes can be differentially expressed you can still get differences in males and females even though they both share (almost) the same genes but there can't develop a major gap between male and female genomes because they share almost all the chromosomes. The Y chromosome is the only exception but it's not a healthy chromosome because it is exclusively passed down the male line and thus can't rely from recombination to "repair" damaged genes and shuffle genes into new contexts.
Jun
18
comment Where does all the food go?
If the total mass of everything released (as carbon dioxide, urine, faeces, etc.) was equal to the mass of the intake then animals wouldn't function. Your friend is wrong, Roman, in that the conversion of mass to energy does not account for the energy difference but it does occur albeit it at very low levels. It is this conversion of mass to energy that provides the energy needed for the body to function with the energy eventually being lost as heat.
Jun
18
comment Are human males and females more genetically different than members of other species?
They are different. Google 'sex differences in epigenetics' and you'll see there's quite a few papers on the subject. It's not my area so I won't claim to know the details.
Jun
18
revised Are human males and females more genetically different than members of other species?
added 15 characters in body
Jun
17
revised Are human males and females more genetically different than members of other species?
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Jun
17
answered Are human males and females more genetically different than members of other species?
May
16
comment Why do eukaryotic organisms have introns in their DNA?
But prokaryotes do have introns - ncbi.nlm.nih.gov/pmc/articles/PMC177115 - although on nowhere near the scale that Eukaryotes do.