0
votes
1answer
10 views

What fraction of sites are expected to be polymorphic?

Question Consider a very long (eventually infinite) DNA sequence of neutral sites. Consider a panmictic population of constant size $N$ with a per site mutation rate of $\mu$ where all individuals ...
0
votes
0answers
2 views

Evolution of the Redundancy of the Genetic Code

Looking at the genetic code, I realized something. Let's assume that that every codon occurs at equal frequency. It is probably wrong but useful for the sake of the calculations. Using observed ...
1
vote
0answers
3 views

How does the Platypus grow before it eats?

From this fascinating documentary on monotremes it is mentioned that the Platypus is born less than 1 cm in length, but has doubled its size by day three when it begins to nurse. How does the animal ...
1
vote
2answers
77 views

Swapping genes?

So, gene therapy is to take out a gene, correct its mutation, and put the corrected one back into the organism, right? Is it also possible to take out a gene from an organism and put in a totally ...
0
votes
0answers
8 views

What are the features of a specific neurological signal?

My question is about the neurogical signals. In our body when a signal for example a hearing signal from haircells is built , it goes through a lot of neurons and it pasees a lot of crosses ( I mean ...
0
votes
0answers
10 views

About the small intestine's Vitamin K absorption and large intestine's Vitamin K absorption

Why in the small intestine does Vitamin K absorb to the lymph, while in the large intestine it absorbs to the blood?
0
votes
0answers
7 views

Which taxonomic classification schemes are most accepted?

The taxonomic classification schemes followed by universities around the world are different. I wish to know what are the most accepted classification schemes till date concerning the following - ...
0
votes
1answer
11 views

Is 100% accuracy in DNA sequencing possible?

I would like to obtain a complete genome of a canine (with mitochondrial DNA too) at 100% accuracy. Is it even possible with the current technology? The source I have is potential degraded, i.e. dried ...
4
votes
2answers
152 views

How do you store membrane proteins?

We're producing some membrane proteins and they aren't amenable to freeze thaws even when we add glycerol. The proteins are solubilized in detergent above the cmc so they should be in micelle form in ...
2
votes
1answer
12 views

Physiology of tricuspid and bicuspid(mitral) valves

The tricuspid and bicuspid valves are atrioventricular valves. Both are valves that prevent backflow of blood pumped from the atria to the ventricles. However, the former has 3 "flaps" while the ...
2
votes
1answer
46 views
+50

Explanation of ECG in MI using an electrostatic model

I found a paper presenting an electrostatic model to explain the ECG recorded in various leads. This model essentially calls for considering the depolarization wavefront to be the major contributing ...
4
votes
2answers
86 views

How does decreasing surface tension of lipids help to emulsify them?

According to my chemistry book, water has higher surface tension than lipids. But in my biology book it is written that "the gall forms an emulsion of water and lipids by lowering the lipid's surface ...
3
votes
1answer
15 views

Need some good resources to learn about Protein function and structure

I'm taking a course on biochemistry at edx. Since I'm a computer science student, I'm having some trouble in understanding many biochemical concepts. While the first module was just fine, I found the ...
0
votes
0answers
8 views

MIN 6 cell culture

I am trying to culture MIN 6 cell line. After one passage and about 5 to 8 days later the cells show round morphology,however I did not found any linkage between them they look all apart from one ...
0
votes
0answers
13 views

Book recommendation on the human muscle system

I would like to learn more about the exact mechanism behind our movements, especially about what happens during intense training when anaerobic state arises.
1
vote
0answers
11 views

Negative association between habitat quality and reproductive success in birds

I'm looking for bird studies that have found either a negative correlation or no correlation between habitat quality and reproductive success. Or in other words, bird studies that have found that ...
-1
votes
2answers
122 views

Why a striped baby is not the result of a white and a black parent?

Someone asked me: If a striped cat is the result of a white and a black cat, why the result of a white woman and a black man is not a striped child? I know the answer. I also know that the ...
0
votes
0answers
39 views

Why does somebody have to take a live-long medication when diganosed hypothyroidism? [on hold]

My wife was diagnosed hypothyroidism 2 years ago by her general practitioner and she has to take L-thyroxine to compensate that. It started with 50mg and as she went to further examinations to check ...
0
votes
1answer
11 views

seqtk trimfq using Parallel fastx_trimmer [on hold]

I'm new at this, and I'm trying to do RNASeq. I've done the quality analysis already with fastqc. Now, I'm on the quality control part. I need to use seqtk trimfq or fastx_trimmer to trim the first 5 ...
-1
votes
0answers
22 views

Inducing Totipotency and Pleuripotency [on hold]

Totipotent cells can divide and differentiate into any type of cell. Pluripotent cells can divide into many types of cells. Is there any way to induce any of these? If yes, how?
6
votes
1answer
49 views

What is the biochemical explanation for tingling and burning sensation in brain due to certain food?

Consumption of mustard (spicy English Mustard), wasabi and horseradish based food dressings usually result in a burning, tingling or freezing sensation in the brain/scalp and nostrils as the vapour ...
4
votes
0answers
62 views

How does an organism know when to stop growing, whether it is already on the outermost layer? [closed]

When a multicellular organism is under its development how does the current outermost layer of cells "know" that they should not divide furthermore, as their bodyplan coded into DNA is already ...
1
vote
2answers
60 views

Referencing the homologous chromosomes

There exist a co-ordinate system from chromosomes like "12p11.3". In this system, first integer range from 1 to 23 i.e it takes homologous chromosomes as a pair. If we want to distinguish among ...
-1
votes
0answers
26 views

How do formic acid from ants causes acids? [on hold]

Ants release acids but how do they work? Ants release them for protection but how does it affect others?
5
votes
0answers
57 views

Why do some medicines induce sleep? [on hold]

I have seen lot of people sleep or say that they are feeling sleepy after taking some medicines. Why? I mean, if a medicine acts on some cell of the body because that cell has got its receptors and ...
-2
votes
0answers
23 views

How does carrying sea anemone help Hermit Crab? [on hold]

Sea anemone is carried by hermit crab. what is the advantage?
1
vote
1answer
39 views

Choosing the best assay for my experiment?

Which of the following assays can be used to determine whether cell death specifically due to apoptosis has occurred in a given cell sample? Choose all that apply. WST-1 Assay Caspase Colorimetric ...
0
votes
2answers
57 views

Evolution of insects, spiders and jellyfish

Well we all learned at school the classic evolutionarily theory ...
0
votes
0answers
23 views

How to measure the biomass of hydroponic plants in netpot/rockwool DWC system?

I'm doing an experiment with 4 kale plants, each in their own small deep water culture (DWC) system. Each plant was transplanted in rockwool with netpots and clay pebbles. But I need to periodically ...
2
votes
0answers
33 views

Skin extra sensitive to heat after burn

I just got my finger burnt (first degree burn $\Rightarrow$ I didn't even bother to bear the wound). It didn't hurt much, even when I pressed the wound. However, when exposed to heat (hot water, but ...
-2
votes
0answers
28 views

Plankton growth as a function of temperature [on hold]

i have data set of tempaerature and phytoplankton species abundance for different months of different years. I want to plot growth rates as functions of temperature for all species. How I can do ...
6
votes
1answer
35 views

Do butterflies pass over migration patterns to their offspring?

So, earlier, I read online (http://io9.com/butterflies-remember-a-mountain-that-hasnt-existed-for-509321799) that Monarch butterflies veer east during their southward migration to avoid a mountain ...
1
vote
1answer
33 views
2
votes
2answers
75 views

How do researchers map root systems of plants?

For example, here is a picture of the root systems for some prairie grasses: (Click image for higher-resolution PDF) from: http://www.conservationresearchinstitute.org/educational-offerings.html How ...
4
votes
0answers
49 views

What is basis of centralization of “master glands” in the endocrine system?

I have just started reading about the endocrine system and I am having some difficulty understanding the basis of distribution of glands and associated hormones. I am using centralized to describe ...
1
vote
1answer
31 views

Design arbitrary degenerate primers (with non-binding criteria)

I would like to design a number of arbitrary degenerate primers (primers with variable bases, e.g. NGATWGCTSATNGC) for a TAIL-PCR. I would like to be able to ...
0
votes
0answers
19 views

Cut-off values for LD, LOD and D-prime as algorithmic input

I created an algorithm to generate SNPs for random people of different descents - based on HapMap data. While this works good, there is something else I want to take into consideration. So if a SNP ...
2
votes
0answers
36 views

Efficient algorithm to calculate various population divergence statistics

Intro and description of the data I am simulating the evolution of very long DNA sequences. The model works well, is performant and will output data in the following kind of fasta format ...
2
votes
1answer
30 views

Application of Latin names for Taxonomy

The current taxonomy has family names like Canidae and Felidae. But Felidae has sub families like Felinae and Pantherinae. Roaring cats and non-roaring cats. My question is based on the fact that we ...
0
votes
1answer
54 views

At what saltiness will water simply pass through us?

If water has a low salt content, it hydrates us. When water has too high salt concentration, like sea water, it drains water out of us instead when we drink it. At what salt concentration would water ...
4
votes
1answer
44 views

Did any dinosaur molt?

Like snakes or lizards, did any dinosaur molt ? if yes, have we any proof of it ?
6
votes
0answers
21 views

How does chromosome fusion get fixed in the population?

It's well known that one of human chromosomes is the result of fusion between two chromosomes in a primate ancestor. If we put anthropocentrism aside, it becomes clear that fusion events happened a ...
4
votes
0answers
19 views

Spatial learning in microorganisms

Has there ever been an experiment performed that demonstrated a form of 'spatial memory' in a unicellular organism? I'm imagining something analogous to the classic 'rat in maze' experiments, but ...
1
vote
2answers
45 views

Which ORF will be translated

I've a question about ORF and translation into protein. Say I have an RNA transcript that contains two ORFs, one in phase 1 ; one in phase2 ; as: ORF number 1 in reading frame 1 on the direct ...
3
votes
0answers
38 views

How many animal species are larger than humans? [on hold]

I sometimes think about just how huge humans are in comparison to most animals. Even compared to a squirrel, which is really a pretty large organism in the grand scheme of things, humans are hulking ...
11
votes
3answers
2k views

What is happening when we get a tan?

Almost everyone nowadays wants that nice summer tan, but what exactly is going on beneath the skin? I've heard a few different theories about tanning - such as a tan is nothing but the pigmentation in ...
7
votes
2answers
1k views

Is this a crayfish hole? or wasp nest?

I'm suspicious that it might be crayfish, which I'd think was insane (I still kind of do), if I hadn't found a dead one around my house earlier this summer. Is that definitely what it is, or do I ...
-3
votes
2answers
46 views

Transfer by Ingestion [on hold]

Does our body absorb GM dna or Natural dna or dna of someone else's human blood(not relatives) taken with food so big that it has genes?
3
votes
2answers
72 views

Why can we use mouse-produced antibodies on mice tissues?

I have seen biologists use mouse grown primary antibodies in mouse tissue, and they've told me that if the blood is perfused well then there is no problem with this method. How does the secondary ...
2
votes
0answers
12 views

Which hydrophobicity scales are best for detecting transmembrane regions, and why?

There are many hydrophobicity scales for protein analysis. Broadly, I gather the differences between them are from the experimental method to acquire the data and the normalisation (or lack thereof) ...

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