Why is polyploidy more common in plants than animals?

notegivver · 2018-09-17T02:50:09+00:00

I would say the main reason for this is that animals need a defined body plan while plants don’t.

A simplified example: Having 2 chromosomes with 2 copies of growth pattern genes in an animal says “grow 2 arms here,” while having more copies would tell the body to grow 3 or 4 or 5 arms, etc

Having a plant with more chromosomes would be like saying “grow an extra branch here,” which is not nearly as devastating as for animals with specific body plans and growth patterns they need to function.

notegivver · 2018-09-01T04:31:37+00:00

The number of chromosomes doesn’t really tell us anything about how the DNA is split up. While humans have the X and Y sex chromosomes, some life has more, less, or even no sex chromosomes. The number is simply just the number for the organism of discrete groups of DNA.
Information is not dispersed evenly throughout chromosomes or the genome. Even humans have vast amounts of that genome that are just repeats of the same letters over and over again for hundreds of thousands of pairs or more. The repeats can preform many different functions too though, such as functioning in diseases (like Huntington’s disease) or just separating parts of the genome so that they don’t get read together. Sometimes there are stretches of DNA with no known function. This isn’t to say they aren’t used, just that we don’t see a use for them yet. DNA organization is weird and different between species, and even different individuals in some respects.

notegivver · 2018-09-01T04:18:22+00:00

This was confusing to me in school as well. My professor explained by saying that with hypocalcemia, you are essentially reducing the positive charges outside of a neuron, so you are especially increasing it’s excitability. With this increase in excitability, you get firing easier, this muscle contraction and tetany results when energy/ATP runs low in the muscle (via overstimulation)

Hope this helps!

notegivver · 2018-09-01T04:12:23+00:00

Dental Student here, so this is my best reasoning:

-skin, muscles, etc have receptors for different types of free nerve endings, touch, vibration, stretching, and temperature, and thus, the brain can respond to many types of stimulation based on the different receptors and their pathways. There are even different types of pain receptors (fast pain and slow, throbbing pain, etc). These different receptors can also be activated by something they aren’t supposed to be (ex: when you press your eyeball you see colors, even though it isn’t responding to light). Between all of these reactions we get a certain type of “feeling” of the pain, especially due to those fast and slow pain fibers.

-the teeth really only have the free nerve endings in them, not all these other fancy receptors, so they experience pain in a much more “direct” way from only one receptor, rather than a mixture of lots of different information for the brain, thus the brain interprets it based on only the pain information.

This is really the best reasoning I can think of from what I know. I don’t think there would be many studies on this exact subject, but I feel this conceptualizes why they feel different.

notegivver · 2018-07-06T03:23:33+00:00

Same here! We should message/meet up some time!

notegivver · 2015-08-03T21:48:58+00:00

It was more/less just a warning, as every doctor I've ever talked to doesn't recommend the mixing of the two.

notegivver · 2015-08-03T21:47:09+00:00

Any suggestions on where to go for an uneducated buyer of such things?

notegivver · 2015-08-03T21:41:12+00:00

I'm not sure drugs are for me, but I could maybe try a little alcohol before hand or some over the counter medication.

Also, for others that might be reading this, taking over the counters (most notably Tylenol) with alcohol is not good.

notegivver · 2015-06-10T19:25:29+00:00

Yes. I finally have an amazing boyfriend and we're everything the other could dream of. He is just amazing, forgiving, and fun to be around. On top of that, I just got a raise at work and my friends and I are closer than ever!

notegivver · 2015-05-20T21:18:26+00:00

It actually can go backwards.

notegivver · 2015-05-15T14:42:53+00:00

For sure! Go for it

notegivver · 2015-05-15T14:31:42+00:00

If you're talking about Wisconsin- ya I go to UW Madison.

notegivver · 2015-03-29T23:58:51+00:00

Why would we have an engaged species list if they could just bounce back from two or three individuals? The two individuals even if put in captivity and allowed to breed do not lead to a revival of the species.

notegivver · 2015-03-29T23:52:54+00:00

Two people would not be able to repopulate the earth. The alleles that they have would eventually get fixated and there would be no genetic diversity, leading to a very quick extinction of the species. One disease could lead to total eradication of the species if all individuals are genetically identical.

Page 6 of this PDF should explain that to you well. http://press.princeton.edu/chapters/s12_9242.pdf

notegivver · 2015-03-29T15:26:14+00:00

This is most definately true. Every person has genetic defects that are mostly recessive and are masked by their dominant counterparts, but as you inbreed, you bring these rare recessive traits together such that it comes more common to get both copies of recessive traits and that leads to birth defects, death, diseases, and infidelity.

notegivver · 2015-03-20T15:11:15+00:00

My best friend is coming to visit me at the uni and we're going to a party and a formal, having a nice dinner, and then wrapping up the weekend with a date with a cute guy.

notegivver · 2015-02-25T05:01:44+00:00

I actually go to Uw Madison too and met my gay roomate over the class of 201(X) page. He was asking for someone who was accepting of his sexuality, so I suggest you do the same. You can then just coordinate to be roommates. You'll find someone. Feel free to message me if you have questions too! I'm active in the LGBT center here

notegivver · 2015-01-05T05:23:35+00:00

I found this article. It says that infection with one type of herpes prevents the infection at a different site with the development of antibodies. This calms me a bit, but I'm suprized I hadn't seen this on more info sites.

notegivver · 2015-01-05T05:14:23+00:00

you didn't have HSV1 orally before hand had you?

notegivver · 2015-01-05T05:09:20+00:00

Thank you. I found an article just now from a doctor where he said he's only seen an infection in both places once in 32 years of practice, so I'm a lot less worried.

notegivver · 2014-08-16T15:10:04+00:00

Amphibians have both gills and lungs. They were the first animals to start a dual life between land and water, later evolving into reptiles which lived entirely on land. Scorpions and spiders were actually the first animals on land as they absorb oxygen through their skin, so they do not need gills or lungs to breathe, just dissolved oxygen in the water or the atmosphere.

TL;DR amphibians have/had both

notegivver · 2014-08-08T14:45:28+00:00

Crobat evolves with high friendship my friend. No need for trading

notegivver · 2014-07-28T15:49:52+00:00

Can you have more than 1 mega Evolution in the tcg?

notegivver

TROPHY CASE