Questions tagged [genetics]

Genetics is the branch of biology that deals with the transmission and variation of inherited characteristics.

Filter by
Sorted by
Tagged with
0
votes
0answers
4 views

analysis of post transplantation lineage tags

I'm having some trouble understanding some bits of a study, mostly about the Sleeping Beauty system and TARIS model, from this paper: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4408613/ I ...
12
votes
1answer
19k views

What do the signs +/+ +/- mean in this image?

I don't understand what this graph is supposed to explain, especially what the signs +/+ or -/- mean. I just know it characterises some rats.
0
votes
0answers
22 views

Understanding HSV1 - What could be an appropriate/common path?

This question could be off-topic, but I will try to make it fit. I have no biology background at all but want to get a more detail understanding of Herpes Simple Virus 1 (HSV), how it works, how it ...
1
vote
2answers
47 views

What is the substance that tumors release that stimulates growth of blood vessels but suppresses its release from other tumors?

I'm currently in high school and I am working on a cancer research project. My project consists of a cancer, and different ways to treat it. I have a set of benign tumor and I was thinking of ...
0
votes
1answer
29 views

Why is sickle cell trait expressed in half of all cells rather than all cells containing half-sickled haemoglobin

If sickle cell trait is due to be heterozygous with respect to a single gene mutation on the haemoglobin β-globin chain, why is it the case that ~50% of RBCs are sickled rather than half of the ...
0
votes
1answer
46 views

Is every flower on a plant unique?

I've noticed on my dahlia plants that sometimes there's a flower which looks completely different then the rest . Either color or structural. I dig these bulbs up each fall and keep inside to replant....
1
vote
0answers
39 views

How can we say that a gene is spacio-temporally regulated?

Gene expression is depending on the space and time of the cell. How can we distinguish the function of a gene without a chance of changing its expression? And also how is it possible to find the exact ...
5
votes
4answers
5k views

The human has 46 double chromosomes or simple chromosomes?

What I mean: does the human cell have 46 of these: or 46 of these: Thank you in advance.
-2
votes
0answers
30 views

What is maximum growth rate possible for tree if we could genetically modified it?

If we genetically modified tree to have it grow as fast as possible and consume carbon mass as much as possible. I want to know the uppermost limit for it to grow in each year around the tropical area ...
5
votes
2answers
197 views

What controls specific gene silencing during cell differentiation?

I am intrigued by the fact that all cells of our body use the same DNA. How do the cells differentiate during the post fertilisation divisions? I read about gene silencing, which can be an answer to ...
7
votes
2answers
84 views

How does a drastic change to the genome persist and spread?

I just read the article on songbirds in the November, 2019 Scientific American. The article explains that songbirds have an extra chromosome, called GRC (germ-line restricted chromosome) that other ...
7
votes
2answers
168 views

Why do telomere lengths not predict differences in life spans among species?

We read that ageing is related to cell death when we run out of telomeres at the end of our DNA molecules. Humans live roughly for 70 years - the traditional three-score years and ten. This compares ...
9
votes
3answers
118 views

How Incomplete dominance can be explained at molecular level?

What is exactly happening at the molecular level when two genes constitute incomplete dominance? Whether the protein formed from each of the genes constitute a new protein having a different function ...
19
votes
1answer
2k views

Do some genes follow Rock-Paper-Scissors model of dominance?

Assuming there are at least 3 alleles of the gene $G$ in total - $G_R$, $G_S$ and $G_P$ - is there any gene for which the following is true? $G_R$ is more dominant than $G_S$. $G_S$ is more dominant ...
0
votes
0answers
26 views

Way to analyze the functional relevance of human mutation in vivo

In the literature I „found“ a pointmutation in the protein coding sequence of an enzyme subunit to be a risk factor for a certain disease. It is not known whether the mutation leads to loss or gain ...
0
votes
0answers
25 views

Study on Introns?

I am curious whether there has been a study done on the effects of removing introns. Specifically, what happens if you genetically edit a eukaryote genome to no longer contain introns? Or maybe just a ...
1
vote
4answers
179 views

Is evolution a means to an end?

In "The Red Queen", Matt Ridley frequently argues that evolution is a means to an end, without providing much explanation for such a big statement. Is this a fact in biology? Do species mutate their ...
-4
votes
1answer
78 views

Genetics and Heredogram - Proving the teacher is wrong

I want serious help here. I'm in first year of medical school and I jut had my second test in Genetics. One question of the test gave us a heredogram and asked us what was the most probable type of ...
0
votes
0answers
27 views

Brain evolution in the age of the caesarian

I have just been reading an account of the evolution of human intelligence in Matthew Syed’s recent book on diversity, called “Rebel Minds”. He is not the originator of this idea, but he suggests ...
0
votes
0answers
9 views

Rods and Cones functioning in Achromatopsia affected individual

When facing genetically caused Achromatopsia have the cones still been developed by the individual or does the latter completely lack them? I have looked for evidence both online and on some more ...
0
votes
2answers
3k views

Genetically speaking, are dogs exactly similar to humans and chimps both?

Richard Dawkins mentions in his book The Greatest Show on Earth that dogs are exactly similar to both humans and chimps. Supposing that a cell contains the genetic similarity between 2 species, he ...
28
votes
2answers
7k views

Is it possible that by mutation a human could see infrared or other 'colours'?

Incoming light reacts with the several types of cone cells in the eye. In humans, there are three types of cones sensitive to three different spectra, resulting in trichromatic color vision. Each ...
12
votes
7answers
29k views

What's a non-allelic gene?

Non-allelic or non-alletic I stumbled across the term in my Human Genetics textbook. It didn't explain it there, and a quick google search only showed scientific papers that refer to 'recombinations ...
-2
votes
2answers
57 views

Identify which of the two columns A and B represent gene and chromosome

I am a bit confused on this question in my Textbook (STD 12) and have got all sorts of answers on searching it but I am still not able to comprehend it literally. Can someone answer this and explain ...
34
votes
2answers
14k views

What is the advantage of circular DNA in bacteria?

From what I understand, bacteria have circular DNA. What advantages does it have over linear strands like for eukaryotes? Do there exist bacteria with more than one ring of DNA?
1
vote
0answers
16 views

Which trait does the given Pedigree chart show? [closed]

I have a doubt in this pedigree chart , according to me it should be autosomal dominant. But the ans given is X linked recessive , in the case of X linked recessive one daughter should be carrier and ...
0
votes
0answers
52 views

How much DNA (or genes) do homo-sapiens and ursus arctos (brown bear) share?

How much DNA (or genes) do homo-sapiens and ursus arctos (brown bear) share? There are articles online that indicate that humans share xxx% of DNA with Chimpanzees, bananas, and other assorted ...
2
votes
2answers
3k views

Do plants have distinctive DNA genomes from each other like humans do?

Can exact same species of plant have a distinct genome from others of same exact species growing nearby or in a different place/country etc. ? Can a leaf be traced to the the exact plant based on DNA ...
1
vote
1answer
90 views

What is the genetic reason that this flower has petals of two different colors?

I have two different varieties of the flower, portulaca: one is bright pink, the other is pure white with pink specks at the centre. Recently a flower bloomed which had 50% of the former and 50% of ...
0
votes
1answer
31 views

Do conservation oriented genetic database exist?

Are there any projects for the creation of the international genetic database of all endangered species, so we, at least, have a chance to clone them in the future if our current conservational ...
3
votes
1answer
154 views

Can primers for PCR be duplicated?

Complete beginner question here, don't laugh: If I have some primers that have been synthesized, and I am close to running out of them, is there any way to duplicate them / amplify them / synthesize ...
3
votes
2answers
2k views

Advantages of pain sensation?

The hazards of congenital insensitivity to pain (CIP) are well-known. This question is about the obverse: what selective advantage, if any, does the normal sensation of pain confer? I'm thinking of ...
1
vote
0answers
23 views

chromosome 19 and recombination

Im doing a project with structural variation created by recombination within the human genome during spermatogenesis, where im especially examining intrachromatid homolog recombination. I find that ...
-1
votes
1answer
49 views

Why does X inactivation happen?

Is X inactivation really important? Why don’t the dominant genes on one chromosome mask the recessive on the other chromosome? This happens in other sets of chromosomes so why exactly does this happen ...
0
votes
2answers
21 views

What's the difference between the terms “gene map” and “genome”?

It seems some sites arbitrarily restrict "gene map" to only a single chromosome, but others don't. Supposing we don't restrict it to just a single chromosome, is it different from "genome"? Are these ...
1
vote
0answers
15 views

Linkage terminology in drosophila

Consider two linked loci that are 50+ map units apart. I perform a test cross between a female that is heterozygous at both loci to a male that is homozygous recessive. In this case, the phenotypic ...
0
votes
0answers
38 views

Linker DNA and Genetic Expression

So I was reading on linker DNA, and the textbook only describes it in terms of structure. I was wondering if linker DNA can ever contain genes, and if it can, whether it will always be expressed or ...
4
votes
0answers
52 views

Inheritance percentiles

I am aware that the average DNA contribution from each grandparent is 25%, while the possible range is 0%-50%. I found a source citing 18%-32% as the "normal" range but this was undefined. I assume ...
9
votes
2answers
273 views

What was the biological mechanism that allowed Tarrare to eat so much?

Are there any conjectured mechanisms that cause Tarrare's extremely oversized stomach and abdominal cavity? Along with his superhuman appetite of course. Whether from a medical perspective or a ...
3
votes
1answer
87 views

Example of a virus becoming symbiotic with an organism

The human gut has an indispensably beneficial ecosystem of bacteria. What are the examples of a virus that becomes symbiotic with an organism, or even incorporates beneficially into the genome of the ...
6
votes
3answers
114 views

Does recombination slow mutation accumulation in sexual populations? Is there any evidence?

Mullers Ratchet is the process by which asexual organisms would accumulate mutations without bound. It is claimed that sexual organisms would slow this mutation accumulation through recombination. Is ...
1
vote
0answers
35 views

Does intelligence depend more on environment than on genetic factors? [duplicate]

Many have argued that the test of IQ is simply a test of language. The application of the test consists of asking a number of questions. The person should understand the question presented to them and ...
2
votes
3answers
3k views

Book Recommendations: GRE Subject Test In Biochemistry, Cell And Molecular Biology

There are probably a lot of really good answers that may vary significantly in terms of content. I'm looking for a set of books that I can read in preparation for the GRE Subject Test In Biochemistry,...
4
votes
1answer
48 views

Chromosome naming convention: Why are there chromosomes named “1” and “1A”?

I've been stumbling on multiple genome of birds where there is a "1A" chromosome and a "1" chromosome. For example, the zebra finch has 1A and 4A. What does that mean? Do you have any resource about ...
0
votes
0answers
40 views

Is there any evidence that genes which are associated with physically adjacent structures are located near each other within the genome?

I am not sure if there are individual genes for, say, fingers and if so, would such genes be near the genes that affect hand growth? If not "near" in the Euclidean sense, could there be a different ...
1
vote
1answer
51 views

Balancing selection vs introgression?

Balancing selection can maintain polymorphisms in natural populations for extended periods of evolutionary time. However, in this paper, Dannemann et al. 2016 identify three archaic haplotypes in the ...
4
votes
2answers
177 views

Why would low complexity regions be linked with relaxed selection?

I'm reading a text (Wagner, 2007) on identifying positive selection. In the paper, the author says that low complexity regions are known to be associated with the relaxed selection. I'm trying to ...
19
votes
4answers
4k views

Do all humans have an identical nucleotide sequence for certain proteins, e.g haemoglobin?

All humans have the same sort of proteins in our bodies. Take haemoglobin for example. Is the gene coding for haemoglobin in my body identical to everyone else's gene or is there slight variations ...
1
vote
4answers
108 views

Is variation a result of Evolution?

We know that the DNA copying mechanism that replicates DNA during cellular division is not 100% accurate and the resultant errors are the source of variation in the members of a population. At the ...
-1
votes
1answer
52 views

The First Polymerase

Knowing that polymerase protein is needed for the transcription of genes, which polymerase is used in the transcription of polymerase protein itself?