Idk what mental gymnastics you going through to term a recessive disease "dominant". Sickle cell heterozygotes are just in between full blown sickle cell and normal, thats just codominant expression but the disease is still recessive because if it was dominant then heterozygotes would have full sickle cell. Need to inform yourself before making bogus claims online

https://medlineplus.gov/genetics/condition/sickle-cell-disease#:~:text=Inheritance&text=This%20condition%20is%20inherited%20in,and%20symptoms%20of%20the%20condition.

recessive alleles are in general rare. If you got a group of recessive homozygotes and some heterozygotes and put them on an island where there is no genetic flow or drift then you get a population where that recessive allele is widespread

Alleles are variants of genes. And no, still talking about recessive. Sickle cell, as an example, is a recessive disease and is still expressed in heterozygotes

In short, yes. The quickest ways would be via a bottleneck or founder effect, like Pingelap Atoll where a largw portion of the population has a recessive form of colorblindness. But in a normal population with genetic drift and flow, this is pretty unlikely to happen

This is wrong. Some genes can be recessive but not affect the person if the other gene is able to meet the functioning threshold (like make enough of some enzyme), however at times just one recessive gene is enough to cause a disease or other phenotype problem (think a gene that produces a mutant protein that your body can't get rid of). Thats why there are heterozygous diseases

The back of your eye is packed with rods and cones (mostly rods, about 120 million of them vs 6m cones) and the photon is absorbed by them. Inside rods you have stacks of proteins called optic disks, that have rhodopsin in them, which has a small molecule called 11-cis retinal. When light comes through the pupil and hits the rod, some of it will hit the rhodopsin and cause a change in retinal to 11-trans retinal. This change in shape will cause a cascade that closes sodium channels on the rod and essentially turns the cell "off". The turning off of the rod will turn on a bipolar cell which then turns on a retinal ganglion cell that finally sends a signal via the optic nerve to the brain

This is almost correct, the cell will only explode with viroids if the virus is in the lytic stage. Otherwise it will remain dormant.

HIV is a great example of this, it falls into the category of retroviruses which are viruses that integrate into the hosts genome. Once the virus has entered the cell, it comes in the form of RNA so it uses a reverse transcriptase to synthesize a complementary strand of DNA from the RNA. If that DNA is not detected in the cytosol by the cell (we have special detectors that look for intercellular viral DNA, like AIM2 inflammasomes or cGAS STING) then it will make its way to the nucleus where it will get incorporated into our genome by our own machinery

AB can receive A or B because their immune system has antigens for both, so it doesn't matter for them which one they recieve. Its like picking between two glasses of water. Does get a bit more picky if you factor in rhesus factor but overall still the same answer.

Your body has dendritic cells in basically every tissue, so when an infection happens the dendritic cell will mature and lose its adhesion to the tissue. After that it will follow a chemokine trail to the nearest lymp node where it will present the antigen to mature B and T cells in the lymph node. Your lymp nodes also monitor the lymph for antigens, so the closest ones to the infection site will get the most of them and will react the most due to the higher concentration

We still don't have a good definition of the start and end of an orgasm, but one sex researcher said that anus sphincter contractions are what they used in her lab to define it. For pigs, I would guess that is based on observations rather than actual lab measurements

Those mutations are not significant in the grand scheme. While they accumulate over ones life and proteins will be changed here and there, you have 22,000 genes. We would have some crazy changes as we aged if the DNA was significantly changing

Your DNA does not change a lot, this is wrong. While your DNA undergoes many mutations, the overall "code" remains essentially the same

Not sure about other places, but in many of the remote lakes in the Washington mountains there are a bunch of fish and from what I heard from a park ranger is that they were dumped by helicopters in there. No clue why though

Oh interesting. I thought there might be some more systemic effects involved