8 votes

Have there ever been "half-twins" who were halfway between siblings and twins?

Yes. A case of semi-identical twins was reported in 2006. These twins share 100% of their maternal alleles and 50% for their paternal alleles. It's hypothesized this arose from a double fertilization ...
Darlingtonia's user avatar
  • 2,487
4 votes

Have there ever been "half-twins" who were halfway between siblings and twins?

Though your question doesn't make sense to me, I believe the answer is Yes. See the following paper about "sesquizygotic" twins: Gabbett, M.T., Laporte, J., Sekar, R., et al. 2019. Molecular ...
theforestecologist's user avatar
3 votes
Accepted

How to resolve the contradiction between the time required for the fixation of neutral mutations and the time available according to the fossil record

The parameters cited by OP are not in conflict. The misconception relates to a disconnect between what the theory predicts and the type of observation we have available. This leads to an unnecessary ...
Darlingtonia's user avatar
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3 votes
Accepted

Preserving a sample for mtDNA and nuclear DNA analysis

If you're wanting to store DNA long-term at room temperature, you'll probably want to dry it. DNA extraction methods have been known since 1869. You can then use ethanol to precipitate the DNA, ...
Darlingtonia's user avatar
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2 votes
Accepted

What is the word for a small (under 50 bp) structural variant?

One can clearly find instances of "microindel" in the literature. However it does not seem to be very common. "Small indel" appears to be the preferred term, noted here: Typically,...
Maximilian Press's user avatar
1 vote

Evolution of the human Y chromosome

What I want to know, is if this is a bad thing, why don't normal evolutionary forces act to prevent this? You seem to be attributing a moral value to an evolutionary process. So does the article you ...
CaroZ's user avatar
  • 342
1 vote

Pedigree Analysis

I do not see any "error" in the logic of your pedigree. However, pedigree analysis is not a logic puzzle; it's a practical tool. There are additional logical solutions you have not come up ...
Bryan Krause's user avatar
  • 45.3k
1 vote

Preserving a sample for mtDNA and nuclear DNA analysis

For anyone curious, @Darlingtonia's answer is what I needed. It also gave me the search terms that Google could use to finally find further useful information. In particular, a paper published at ...
CXJ's user avatar
  • 123
1 vote

Reading genotype aloud

For Cx3cr1 +/GFP +/+: "Cx3cr1 heterozygous with GFP expression" is the most accurate. "Hetero GFP expression" works if it's clear you're referring to Cx3cr1. Cnr1 flox/flox +/- +/...
BigMistake's user avatar
1 vote

Has perturbation theory been applied to mutation process frameworks?

this is basically the argument behind maximum likelihood tree inference. Parsimony can lead to a lot of issues, as argued in the classic Felsenstein paper (linked). Here is a brief paper discussing a ...
Maximilian Press's user avatar
1 vote

What are the chances that two children of the same couple will have the same genes without being identical twins?

The chances are effectively zero. Even in the absence of recombination, this calculation involves choosing the correct member of a pair from each of the 23 chromosomes, from both the father and the ...
Darlingtonia's user avatar
  • 2,487
1 vote
Accepted

How did the Zinder-Lederberg experiment on Transduction work?

There certainly are detailed explanations of the experiments. For this answer I'm using a 2016 retrospective in J. Bacteriology, the same journal that published the original paper. However those ...
timeskull's user avatar
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