Hank și fratele său John discută despre ereditate prin exemplul grosolan al umidității relative a ceară a urechii.
Acest videoclip folosește sunete de la Freesound.org.
Referinte:
http://www.mpiwg-berlin.mpg.de/en/research/projects/DeptIII_Cultural_History_Heredity
http://www.pbs.org/wgbh/nova/genome/her_ari.html
http://www.universityofcalifornia.edu/news/article/4465
http://www.nytimes.com/2006/01/29/science/29cnd-ear.html
http://udel.edu/~mcdonald/mythearwax.html
Crash Course este pe Patreon! Ne puteți susține direct înregistrându-vă la http://www.patreon.com/crashcourse
Doriți să găsiți Crash Course în altă parte pe internet?
Facebook – http://www.facebook.com/YouTubeCrashCourse
Twitter – http://www.twitter.com/TheCrashCourse
Instagram – https://www.instagram.com/thecrashcourse/
CC Copii: http://www.youtube.com/crashcoursekids
Summary
This video discusses the history of heredity, the work of Gregor Mendel, and the basics of classical genetics, including genes, chromosomes, polygenic traits, pleiotropic genes, and Mendelian traits.
Highlights
Heredity is the passing on of genetic traits from parents to offspring.
Gregor Mendel was the first person to study heredity in a modern way.
Genes are sections of DNA that determine traits, and most physical traits are a reflection of multiple genes working together.
Some single traits are decided by a single gene and are called Mendelian traits.
The consistency of ear wax is a Mendelian trait determined by a gene on chromosome 16 with two alleles one for wet ear wax and one for dry ear wax.
Heredity, CrashCourse: Filmography
Nice
I love the Hank & John tag team
I wish good luck to Hank
@ the 0:31 mark it sounds like john is not happy and was forced into this lol
11 years later, I finally know why I'm balding… thanks great great great grandfather
Thanks for the videos. It's always helpful!
i wish i was not eating my lunch while watching this.
squilliam
sorry, is haploid cells the gametes cells or diploid? please answer!
00:00 Heredity is the passing of genetic traits from parents to offspring.
01:26 Classical Genetics simplified: Traits are determined by genes on chromosomes.
02:41 Wet or dry earwax is determined by a single gene.
03:54 Gametes are haploid cells with one set of chromosomes.
05:17 Understanding the dominance of alleles in earwax type inheritance
06:25 Determining earwax phenotype through Punnett Square
07:27 Wet ear wax and body odor are correlated due to the same gland producing ear wax and armpit sweat.
08:47 Balding is caused by a recessive allele on the X chromosome