1
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1answer
79 views

Body's decomposition

Does a human body decompose in a completely sterile environment ? If yes, what decomposes it ? And how fast ? What happens in vacuum ? Can it remain exactly the same ? Thanks
1
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2answers
61 views

Protocol for measuring stamina of arthritic mice

I am going to make some mice ill with arthritis. The medicine which I am testing as control is known to cause extreme fatigue. I think I've improved it. I'd like to humanly measure their stamina in ...
1
vote
2answers
115 views

Would it be correct to state that any biological difference between the sexes has to be found in the Y chromosome?

If the reason Why Men Don't Listen and Women Can't Read Maps is genetic, then one of the genes in the Y chromosome is to blame and in theory could be identified. Correct or incorrect?
1
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1answer
101 views

Why can't we propose a solid theory regarding origin of life?

What information is greatly lacking which does not allow us to propose a solid theory for origin of life ?
1
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1answer
158 views

If people with colorblindness lack one type of cone cells, shouldn't they be unable to recognize one particular color?

The 3 types of cone cells in normal humans allow them to view 3 types of colors and any color made from mixing and matching those 3. So, 2 types of cone cells should only allow to view just 2 types ...
1
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1answer
1k views

In what animal species is the sex ratio skewed in favour of the fertile female?

Ants have something like a single fertile female to several males. The same applies to bees, and larger animals - elephants too. Is the sex ratio universally skewed in favour of the female? What ...
1
vote
1answer
180 views

How to obtain bacteria samples?

Would anyone know how to go about obtaining samples of Salmonella or E. coli for purely educational purposes? Note: I just want to look at the stuff under a microscope.
1
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1answer
75 views

Can ant colonies have two “branches”?

Could an ant colony have 2 or more "branches" located far from each other (i.e. physically separated but interconnected nests) ? If so, how far is the limit?
1
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1answer
120 views

Single Nucleotide Polymorphisms and diseases

I am writing a report on how Single Nucleotide Polymorphisms occurring in each of these regions: Transcription factor (TF) binding sites Epigentic signals Splicing variants MicroRNA binding sites ...
1
vote
1answer
100 views

Hardy-Weinberg applied to three alleles and stimation of allele frequencies

I have this equation: Corresponds to HW in equilibria with three alleles: $(p+q+r)^2=1$ Expanding the square results: $p^2+2pq+r^2+2pr+q^2+2qr = 1$ I need to separate homozygous and ...
1
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1answer
61 views

Is Schoons Hard Shell muskmelon a hybrid?

Would Schoon's Hard Shell muskmelon be considered a hybrid as I have read it was a cross between a Bender's Surprise and a Honey Rock.
1
vote
1answer
58 views

What's seen when stress echocardiography shows ischaemia? Can this happen without angina?

What can be seen on the screen when stress echocardiography (a pair of heart ultrasounds before and after exercise) suggests ischaemia? Can this happen without chest pain? Illustration from ...
1
vote
1answer
95 views

By what mechanism does elevated homocysteine level accelerate thrombin formation?

It has been stated that elevated homocysteine level accelerates thrombin formation. By what mechanism does this happen?
1
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1answer
90 views

Reproductive isolation causing evolution

My course book says about reproductive isolation that it does not allow the interbreeding among the individuals of different species. It also says that it is a cause of evolution. How is this cause ...
1
vote
2answers
130 views

Plants without bacteria? is it theoretically possible?

I know from school, that all live on the Earth need bacteria as low-level "machines" that break down/extract/convert/produce chemical elements and combinations, other high-level organisms needed. But ...
1
vote
1answer
36 views

Can the sulphur content of biological material be reliably calculated from fat, fibre and protein contents (Weender Analysis)?

An often-used analysis of feedstocks for lifestocks is the Weender analysis, which basically divides the volatile solid content into fats, fibre and protein, as well as N-free matter. I found no ...
1
vote
1answer
136 views

How to manufacture different sized micelles in nano -scale?

I am trying to answer q5: "How can you manufacture micelles in A) nanometerer -scale B) and in ten nanometer -scale?" My Thinking Observations and some thinking Oil in ...
1
vote
1answer
88 views

Does the Parasympathetic Tract of Colon Sigmoideum Travel with Nervus Vagus and its Nucleus Dorsalis Nervi Vagi?

I have the following tractus now: nucleus parasymphaticus sacrales -> nervus splanchnic -> ganglion terminalis -> colon sigmoideum The tract is parasympathetic. It suggests me that it should ...
0
votes
1answer
36 views

STRING ID - allelic differences and splice variants

STRING has protein (amino acid sequences) mapped to a single gene ID. I have these doubts with respect to STRING ID. I find that 1.All alleles of a single gene share the same STRING ID and ...
0
votes
0answers
16 views

Terrestrial Vertebrate Limbs

This question is regarding the conversation that took place here: Why don't mammals have more than 4 limbs?. I'm not sure if someone mentioned this and I just missed it, but everyone is talking ...
0
votes
1answer
42 views

How does anger relate to blood pressure?

Anger is an emotion generated by neural processes in the brain and is associated with elevated blood pressure. How can an emotion, which is totally related to brain, result in blood pressure changes?
0
votes
0answers
33 views

Dead skin cell decomposition

What would be the resultant by-products of a completely decomposed dead skin cell? What would be the size of each of the by-products of a decomposed dead skin cell? How long would it take for a dead ...
0
votes
2answers
83 views

How do kidney cells excrete their own wastes?

The kidney is composed of tissues, and those tissues are made up of numerous cells - so how do these cells excrete their wastes? Lastly, are there any wastes in the venous blood (renal vein), what ...
0
votes
2answers
639 views

Is it possible for a child to grow taller than their tallest parent?

I have heard that off spring can't grow taller than either of their parents but I've also heard that sometimes some gene activation can skip generations. Is it possible for a child to grow taller than ...
0
votes
0answers
47 views

What good is the MinION?

This year, Oxford Nanopore MinION has been shipped to some researchers for testing. The advantage of a table-top sequencer for diagnostics and personalized medicine is obvious. Similarly, research ...
0
votes
0answers
85 views

Effects of Genetic Drift on Linkage Disequilibrium

From what I understood of @Canadianer's answer here... Genetic drift randomly causes negative or positive linkage disequilibria, by changing allele frequencies through random sampling. Natural ...
0
votes
1answer
101 views

Pathogenesis of Chronic Venous Congestion in Lungs?

I am thinking how CVC in lungs lead to the left-sided heart failure.
0
votes
1answer
67 views

How does DNA mess up

When there is an error in copying DNA (a mutation), what exactly goes wrong? If G goes with C and A goes with T, I don't see how that part can mess up. Is the idea that when the double helix is ...
0
votes
1answer
28 views

Are there any forms of heart failure where cell size decreases?

I think hypertrophy happens in most of the cases. However, I am not sure if hypertrophy always happens. I started to think about wet lungs (pulmonary reason for the left-sided heart failure). Can the ...
0
votes
2answers
408 views

Converting unit/mg or unit/ml into ng/ml, or vice-versa

I am working with the enzyme Cu/Zn Superoxide (SOD1) and i am quantifying them in ng/ml. However, most past studies has SOD1 quantified in unit/mg or unit/ml, and i need to compare the SOD1 level of ...
0
votes
1answer
25 views

Different level of toxicity between smoke

Has there been studies on the difference between the smoke generated from: cigarette or cigar manufactured by brands which are proven to contain more than a hundred of dangerous additional ...
0
votes
2answers
162 views

Is there any genetic similarity that defy evolution theory?

For example, say species A is common ancestor of B, and C. Species B is a common ancestor of D and E. We would expect that there will be more genetic similarity between D and E than D and C. And ...
0
votes
1answer
46 views

Proportion of amino acids from a random polymer of U and C

A protein synthesis assay was carried out in vitro. A polyribonucleotide containing U and C in proportion 1:5 (positions of U and C are random) was used as a template. Which amino acids and in ...
0
votes
2answers
136 views

Can you detect if a mutation is spontaneous or induced?

Is it possible to determine if a certain specific mutation had a spontaneous origin (for example from a mistake of the DNA polymerase) as opposed to an induced origin (for example, from some genotoxic ...
0
votes
1answer
162 views

Need of X or Y chromosome protein after meiosis

After meiosis each spermatid get either the X chromosome or the Y chromosome. I know that the 4 spermatids formed from 1 spermatogonia are connected by cytoplasm and so the proteins made by X or Y ...
0
votes
1answer
403 views

TCGA data, and bioinformatics design questions for SNP/ mirna analysis

It's my first time posting to this forum but was looking for some help on the data aspects of this project. My tools of choice would be in python/R . Goal: I'm looking to create a disease specific ...
0
votes
1answer
91 views

What species of bird is on this coin? [closed]

What species of bird is depicted on this coin? http://www.artic.edu/aic/collections/citi/images/standard/WebLarge/WebImg_000100/139651_846511.jpg Thanks in advance for your help!
-1
votes
1answer
207 views

What is the benefit of using Gonoline-Euroline in combination? [closed]

I was heard that this combination first Gonoline and other culture another culture on Euroline is good one. What is the benefit of using Gonoline-Euroline in combination?
-1
votes
1answer
58 views

bioinformatics /genomics [closed]

i am looking for likely truncation sites to prove recombination in sequences. i have 4 sequences. i believe one to be the "real sequence" and the other 3 to be recombinants caused by cleavage possibly ...
-2
votes
2answers
4k views

At what stage of meiosis does “first meiotic arrest of oogenesis” occur?

An exam question asked what stage of meiosis corresponds with "first meiotic arrest of oogenesis". I can't work out the answer from the wiki page - can anyone explain which step this refers to?

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