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Dec
3
comment Are epigenetic changes involved in evolution?
@Christiaan that's much better, thanks. Close vote retracted.
Dec
3
comment Are epigenetic changes involved in evolution?
Sorry but this is just not answerable. I'm afraid you have completely misunderstood. Epigenetic features have nothing to do with phenotypic changes (they can, but most certainly not always). Please read at least the relevant wikipedia articles and post again with a more specific question.
Dec
2
comment Sexual selection and genotypes
There are dozens of possible explanations. The green tails might be better at impregnating the females so fewer matings would not be a problem. Or, the brown ones might be blindingly fast and can get away from predators, leading to fewer dying and more managing to reproduce. We can't really help unless you narrow it down. Are you just looking for any plausible explanation or are you trying to understand a particular mechanism?
Nov
27
comment Serotonin - Does being aroused make you sleepy?
@AMR still, your rather aggressive comment urged me to check my guess and change my answer to be based on fact, rather than guessing. Happily, my guess wasn't far off the mark. Thanks.
Nov
27
comment Serotonin - Does being aroused make you sleepy?
@AMR if you don't know what a word means, look it up in a regular dictionary, not a medical one. Here are a few: 1, 2, 3, 4, 5. Note that every one of them includes sexual arousal as the primary or secondary meaning of the word. In English, with no other context, arousal will always be taken to mean sexual arousal.
Nov
27
revised Serotonin - Does being aroused make you sleepy?
added 578 characters in body
Nov
24
comment How does the modern synthesis theory explain the evolution of birds from dinosaurs?
@MakotoKato perhaps, but that wouldn't mean it couldn't happen. More importantly, wings would never be selectively neutral. They immediately open up an entire new ecological niche and all sorts of new defensive options. They would most certainly not be neutral.
Nov
24
revised How is instinct carried from one generation to another?
Removed thanks and salutation
Nov
23
awarded  Good Question
Nov
23
revised How are neural networks encoded in the DNA?
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Nov
23
comment How much genomic variation one usually find within a given bacterial species?
Yes, but are those the species you are working with?
Nov
23
revised How much genomic variation one usually find within a given bacterial species?
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Nov
23
comment How does the modern synthesis theory explain the evolution of birds from dinosaurs?
@MakotoKato thanks for the link. I hadn't expressed myself clearly. My main point was that while modern birds may well be descendants of certain dinosaurs, you can't say that dinosaurs evolved to birds. Only that birds evolved from dinosaurs. The first statement implies that dinosaurs were replaced by birds rather than simply that they gave rise to them.
Nov
23
revised How does the modern synthesis theory explain the evolution of birds from dinosaurs?
added 287 characters in body
Nov
22
comment How does one find the corresponding SNPs in the pair of chromonosmes in a FASTA file?
"Two corresponding sequences": corresponding to what? What SNP data? What SNP should be on both chromosomes? The link you gave seems to be for a SNP that can be either hetero- or homozygous. Why are you assuming it is homozygous in your data? What are your data? Please edit your question and clarify, it is very hard to understand what you're asking at the moment.
Nov
22
revised Lac operon: How can lactose enter the cell in the absence of lactose permease?
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Nov
22
revised Lac operon: How can lactose enter the cell in the absence of lactose permease?
Rephrased title to make it useful
Nov
22
answered How to Determine the Most Conserved Sequence from BLAST Result?
Nov
20
awarded  Popular Question
Nov
15
comment How do we know that humans and chimpanzees evolved from a common ape ancestor?
This is a circular argument. You cannot use a phylogenetic tree which is created based on the assumption of the evolutionary process as evidence of said process. You could make a good argument if you explained how that tree was made, that it is a map of genomic similarity. As it stands, your answer is not really proving anything, I'm afraid.