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Feb
1
comment Animals in predicting disasters..!
Animals do not have any special sense which allows them to predict earthquakes or similar disasters, but humans do have an ability believe most anything they hear, or, especially, see written down.
Jan
25
comment Why does heating kidney beans at a low temperature potentiate the toxicity of phytohaemagglutinin?
The source quoted is the first edition (2009) of the FDA's Bad Bug Book. The second edition (2012), no longer asserts that the toxicity increases over the raw state when heating to 80°C, nor does it contain the assertion that "Undercooked beans may be more toxic than raw beans."
Jan
19
comment “Prime” structure of DNA Double Helix: Confusion
In the SE post that OP mentions, the diagram is immediately preceded by a link to the source page of the diagram (via the word "schema"), and on that page there is a "Homework:" paragraph noting that the diagram is mislabeled.
Jan
15
comment How much genetic divergence must there be to yield two different species?
Besides "species" being an ill-defined term, the required genetic divergence isn't appropriately characterized by "how much" genetic change, but rather what precise genes have changed in what ways to prevent population mixing. A single gene or two might cause it, if it affects a critical function, say having to do with sperm/ovum compatibility.
Jan
7
comment Is hypoxia/anoxia the ultimate cause of death?
There is no one ultimate cause of death. For instance, there are neurotoxins which kill brain cells while oxygen remains plentiful, and there is complete disruption of the brain, as with a suicide-bomber.
Jan
2
comment Genotype of children conceived after stem cell transplant?
Infertility is common after chemotherapy or irradiation done for transplants, so the question in that case would be moot.
Dec
22
comment What did pangolin scales evolve from?
Their closest relatives are carnivores, not anteaters, sloths, and armadillos. See DOI: 10.1186/1471-2148-6-93.
Dec
8
comment What effect is seen when the extracellular concentration of sodium is increased?
The question is closed, so answers can't be added, and existing answers generally should not be edited to add material. Welcome to Biology stackexchange Patricia; try adding an answer to an open question instead of this closed question.
Dec
7
comment Why does a fetus drinks and urinates into the amniotic fluid?
The fetal swallowing exercises the swallowing mechanisms and the fluid absorption paths of the digestive tract, which may be helpful. Note that since the kidneys need to function in utero, if the fluid used by them came only from the placenta, the volume of amniotic fluid would need to continually increase.
Sep
8
comment IBD-value in pedigree with inbreeding
IBD (and IBS) is a characteristic of the relationship of two persons' genes, not a characteristic of a gene or allele itself. So the only possible relationships are: no alleles are the same, one pair of alleles are the same and one different, or both pairs of alleles are the same. If R' is ca, then R' and X have IBD (and IBS) value of 1 -- they have one pair the same. The alleles are unordered - you choose the pairings between individuals' alleles so as to maximize the IBD count, having chosen one pair, the other pair is also determined, being the only pairing that can then exist.
Aug
12
comment Did not understand a small excerpt from a research paper
(cont'd) if it said something like "is the one defined for that type of amino acid". Once one understands the bit-for-residue-type representation, one might be able read the sentence as communicating something like that, but if one has not yet thought of that approach, the sentence does not put the idea across well (IMO).
Aug
12
comment Did not understand a small excerpt from a research paper
@ddiez, I did not mean to imply the paper was poor (or the surrounding paragraph), but that the quoted sentence did a poor job of describing the representation, which was essentially the sentence's only job. The surrounding paragraph I don't think makes up for that, although it does provide necessary context. The problem is that nowhere does it convey that there is a defined bit position within the bit string for each kind of amino acid. It says "corresponds to the position of the amino acid residue" where it would be better ...
Jul
18
comment Why can't plasma proteins migrate from capillaries?
See Leukocyte extravasation.
Jun
30
comment What is it that creates that wonderful smell after a fresh rain?
The Wikipedia article on Petrichor mentions geosmin, and indicates it is a compound different than petrichor.
Jun
22
comment Are human chromosomes connected or separate molecules?
@canadianer, Remi.b,: edited to reflect what you pointed out.
May
28
comment What is “theae folium”?
Camellia sinensis is the botanical name for the plant whose leaves are used for the beverage commonly known as tea in English (green tea, black tea, etc.). The plant of course has a flower in the normal course of its growth (as well as leaves, seeds, roots, etc.)
May
17
comment Inoculation vs. vaccination
Interestingly, the word vaccination is derived from vacca, the Latin word for cow.
Apr
30
comment Synteny, genetics?
What do you mean by "the same genes of order"? Did you mean something like "the same genes, in the same order,"?
Jan
15
comment Why don't myopic people see the world upside-down?
Undoubtedly interesting, but not relevant to the question; myopia does not cause image inversion.
Nov
21
comment Looking for a gene in my raw genetic data. What are the possible causes for this?
In short, rs35705950 is not a gene, but rather a SNP, a SNP that occurs within the gene MUC5B. 23andMe measures a selected subset of human SNPs, less than 0.1% of the genome.