Questions tagged [genomes]

The entirety of an organism's hereditary information.

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25
votes
4answers
7k views

Which organism has the smallest genome length?

Which animal/plant/anything has smallest length genome?
10
votes
3answers
10k views

What is the strand specificity of a reference genome?

It's a simple question but I've come across many people who have this question, is the reference genome Positive of Negative strand? Indeed, I've had heated arguments over the same issue. So here's ...
13
votes
1answer
591 views

What limits chromosomal length?

What are the upper and lower limits for chromosome length? Are these limits different in different species or kingdoms? If there is any limit, which cellular or molecular factors are reasons?
4
votes
1answer
209 views

Where can I find the genome of the L-strain coronavirus and the S-strain coronavirus?

I read an interesting article about two strains of the coronavirus: https://www.newscientist.com/article/2236544-coronavirus-are-there-two-strains-and-is-one-more-deadly/ I would like to know how the ...
6
votes
1answer
1k views

Why is it harder to sequence plant genomes than animal genomes?

Plants seem to be less complex organisms than animals, but despite that there are less plant genomes sequenced. Is that because plant genomes are more complex, for example in terms of regulatory ...
6
votes
1answer
805 views

Variations in Genome Sizes

Why is there wide variation in genome size amongst groups of protists, insects, amphibians and plants, but less variation within groups of mammals and reptiles?
4
votes
4answers
5k views

Is our genome decaying (see "Genetic Entropy"), and, if so, is this evidence for our genome being "young"?

In the book Genetic Entropy & the Mystery of the Genome the author says that the genome cannot be old because the genome is "decaying". Decay is a very subjective term, but in this case he means ...
3
votes
1answer
113 views

Interbreedability between current humans and his ancestors

I want to know the first point of time in the past when genomes have diverged so far from modern human genomes so that they both (human and ancestors) are not interbreeadable anymore and can be seen ...
3
votes
2answers
742 views

Why does the gc content deviate from 50% in prokaryotes

I have read quite some articles but I can't figure out the main reason for gc content deviation in prokaryotes. In eukaryotes I can understand it, because the genome isn't composed at random, like ...
3
votes
1answer
84 views

Is There An Initiative To Sequence The Genomes Of Critically Endangered Species?

I realize that there are many isolated efforts to sequence the genome of a particular endangered species such as the orangutan or the snow leopard. However is there a concerted effort to sequence the ...
3
votes
2answers
1k views

Why is the frog genome so much larger than a fish's?

As we have heard in the summaries of the human ENCODE project, 80 per cent of junk DNA appears to have an essential function. Many fish have a genome with only one tenth the size of a usual vertebrate ...
3
votes
1answer
228 views

What does genetically tractable strain mean?

I want to study the properties of Pyrococcus Furiosus in surving to gamma irradiation by exploiting the analysis of DNA sequencing data as a bioinformatics study. Before learning how to analyse this ...
1
vote
0answers
50 views

What are the causes of gene amplification in archaea?

I was studying this article about Genome Sequencing of a Genetically Tractable Pyrococcus furiosus Strain Reveals a Highly Dynamic Genome in order to try to extrapolate some features that could ...
1
vote
1answer
40 views

What is targeted gene disruption?

I am a bit confused about what targeted gene disruption means. I was reading this article in which they compare the Pyrococcus Furiosus genome with a genetically tractable strain P. Furiosus variant ...
0
votes
1answer
123 views

Simplest Biological Organism? [duplicate]

What is the simplest biological organism from which a DNA sample has been or could be obtained? Could the resulting DNA be processed and examined in such a way that the resulting information would ...
-1
votes
1answer
59 views

Estimate for number of genes changed in speciation between a megafauna parent and child species [closed]

At least in terms of a back-of-the-envelope calculation, what is a believable range for the number of gene changes between parent and child species to represent speciation between species of megafauna?...
-1
votes
2answers
66 views

How can I classify the 3 clades(S, G, V) of the coronavirus that are found on GISAID?

On GISAID they classified the corona using 4 clades(S, G, V, Other). I would like to know exactly how these genomes were classified for my research. So how do you classify a coronavirus genome as ...