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What are some interesting facts about genetics?

1. When identical twins procreate with another set of identical twins, their offspring are both genetic siblings and social cousins.

2. Cheetahs were almost wiped out by the last ice-age, and all modern cheetahs are descended from a small portion of the surviving cats that interbred to maintain their species. Because of this, cheetahs are practically genetic clones of one another.

3. The great majority of cancers, some 90-95% of cases, are due to environmental factors. The remaining 5-10% are due to inherited genetics.

4. About 40% to 50% of the genetic information found in our GI tract does not match anything that has ever been classified before, not plant, animal, fungus, virus, or bacteria. We have no clue what it is. Biologists call it “biological dark matter.”

5. The “average” white American is 0.7% African by genetic descent, and that up to 30% of white Americans are between 2% and 20% African by genetic descent. Conversely, 10% of all black Americans are actually more than 50% European by genetic descent.

6. A species of fruit fly was kept in complete darkness for 57 years (1400 generations) showed genetic alterations that were favorable to survival in that environmental condition.

7. Some women can have a genetic mutation that makes them tetrachromatic, which causes their eyes to have four different types of cone cells, enabling them to see 100 million different colors compared to the roughly one million colors most of us can see.

8. Inbreeding and the rare genetic condition called methemoglobinemia resulted in blue-skinned family in Kentucky named the Fugates.

9. There is a genetic disease called the Laron syndrome that results in short stature, longer life expectancy, and near immunity to cancer and diabetes.

10. Blue-eyed people probably have a single, common ancestor, who had a genetic mutation between 10,000 and 6,000 years ago.

11. About one in every 4 million lobsters is born with a rare genetic defect that turns it blue. Sadly, these prized critters rarely survive to adulthood. After all, a bright blue crustacean crawling around the ocean floor is simply easier for predators to spot.

12. One single group of 55 chimpanzees in West Africa has twice the genetic variability of all humans combined.

13. Sickle cell anemia is actually a genetic mutation and is an adaptive advantage to people living in malaria infested areas. Humans with one of the two alleles of sickle-cell disease show less severe symptoms when infected with malaria

14. Through In vitro fertilization (IVF) you can pick the sex of your child, screen for chromosomal abnormalities, and get a pre-implantation genetic diagnosis/screen (to prevent an inherited disease or other genetic defects).

15. Blonde hair is not exclusive to Europeans. Melanesians of the south Pacific evolved a different gene for blonde hair.


This information was taken from Quora. Click here to view the original post.

Which fact do you find the most surprising?

#Science #Quora

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What are your thoughts on this subject?
15 Comments
Caren Rounthwaite
Read THE BOOK WOMAN OF TROUBLESOME CREEK. It’s based on the Fugates. Judy Wilson,
0
Sep 17, 2021 8:41PM
bina sarmah
Excess oxygen-poor hemoglobin causes a dark blue complexion and can happen to both gender.
0
May 8, 2021 5:37PM
Gary McLean
I'm not convinced about all these so-called factual statistics
0
Mar 6, 2020 9:37AM
Judy Wilson
The blue skinned Fugates family from Kentucky I found was extremely intriguing!
0
Nov 12, 2019 1:41AM
Don Racette
Marjorie Healey DOGgone interesting!
0
Aug 14, 2019 4:55PM
Connie Broussard Richard
This is impressive. Thanks for all the information.
0
Apr 19, 2019 4:44PM
Nancy Gardner
Very interesting, I was amazed to hear that some women see so many colours.
1
Mar 10, 2019 9:50AM
Kk
Kk
Very interesting. Enjoyed the read:)
0
Jan 14, 2019 9:37PM
Judi Hanan
Very interesting. I was surprised that 90-95 percent causes of cancer is environmental. I just thought a greater percentage would be hereditary.
0
Jan 13, 2019 12:39AM
greene
Learn something new every day
0
Jan 12, 2019 6:26PM
Nina Hamilton
Some women having a genetic mutation so they can see 100 million different colours, is surprising.
0
Jan 12, 2019 3:56PM
Darlene Davidson
Good one. Genetics is my favourite science and the only one that I got a decent grade in.
0
Jan 11, 2019 5:26PM
vasily tchaikovsky
nice to read, but #3 it is not our time data ,90-95 % cases of cancer -environmental factors -sound funny for me soviet ,dictator, .Stalin should be happy to read this sending genetic scientist to jail
0
Jan 11, 2019 5:11PM
Barry Crews
I don't really believe the one about blue eyed people. Thought it was due to the amount of melanin present in the body...
2
Jan 10, 2019 6:46PM
Lynne Cage
Interesting/ informative thnx
0
Jan 10, 2019 3:32AM

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