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Heredity: Crash Course Biology #9

21517 ratings | 2562657 views
Hank and his brother John discuss heredity via the gross example of relative ear wax moistness. Crash Course Biology is now available on DVD! http://dftba.com/product/1av/CrashCourse-Biology-The-Complete-Series-DVD-Set Like CrashCourse on Facebook! http://www.facebook.com/YouTubeCrashCourse Follow CrashCourse on Twitter! http://www.twitter.com/TheCrashCourse This video uses sounds from Freesound.org, a list of which can be found, along with the REFERENCES for this episode, in the Google document here: http://dft.ba/-2dlR tags: crashcourse, science, biology, evolution, genetics, heredity, aristotle, bloodlines, gregor mendel, mendelian genetics, mendelian trait, classical genetics, chromosome, gene, polygenic, pleiotropic, allele, ear wax gene, somatic, diploid, gametes, sperm, egg, haploid, polyploid, dominance, dominant, recessive, heterozygous, homozygous, phenotype, punnett square, reginald c. punnett, sex-linked inheritance, autosome Support CrashCourse on Subbable: http://subbable.com/crashcourse
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Text Comments (2620)
Dara Meng Long (1 day ago)
Never once. Have I ever realised. Until now. Hank and John do different parts of this channel. I always thought they were the same guy. I am. So sorry.
Atlas - (7 days ago)
John got that iPhone X hairline
Shadowed Skulls (7 days ago)
Anyone else studying for finals using crash course videos?
Nicolas Samanez (12 days ago)
how come its an amino acid in the genetic ode? I thought it was a nucleotide?
Ioan Jivan (12 days ago)
I love this guy's attitude in the course :D too bad the others are different
Jessica Duran (12 days ago)
Ahhh! I am passing anatomy because of Hank! ❤ Hank 🙌
StarBaby1246 (12 days ago)
Thank you now I’m ready for my final
E L (14 days ago)
The intro was so awkward,,,
the amazing cat (14 days ago)
Me in 2018
Sarah Lopez (15 days ago)
Thank you for this!
QuickFlashyy (18 days ago)
Famous philosopher
Beastin Out (19 days ago)
I don't know if Im doing this right but I made a punnet square and put XX and Xy for the 23 chromosome and it looks like its a 50 50 chance of having a boy or a girl but theres a study that when people were not doing well that had more girls than boys so how does where someone live or how they live there life affect the outcome
kiyan ahmadian (22 days ago)
Beautiful job. Beautiful.
Rei Cueno (27 days ago)
Im having my genetics exam in 7days AHHHHHHH!!!!
MLPVoiceActor Fanatic (27 days ago)
Fun fact: Six fingers is actually dominant to five fingers. So many people have five fingers that one usually gets five fingers. Crazy right?
Cheina (28 days ago)
the bit before the intro reminded me of drake and josh
Angel Cabrera-DeJesus (29 days ago)
Who is watching this 2018 science class like if you are
Brielle Quintanar (29 days ago)
Mrs.Morgenroths class come through
Grape 671 (30 days ago)
History is way better than science just sayin
Shyam Malasani (1 month ago)
top ten anime crossovers
Teala Mccullough (1 month ago)
funnч αnd ínfσrmαtívє
G0atboy (1 month ago)
I really want to know alot but I'm to stupid to understand any of this
Sam Dav (1 month ago)
So weirdly enough, I have dark brown eyes (as does most of my family) and my husband has blue eyes (as does most of his family), but our daughter has hazel eyes. How does that happen?
Vb 10 (1 month ago)
Luis Villa (1 month ago)
Anybody watching this before an AP test hehe
Nhi Linh Nguyen (1 month ago)
AP Bio tomorrow anyone?
Chandra Sai Badam (1 month ago)
Thank you it really helped me
Mohamed Slim (1 month ago)
John looks like a nerdy Tom Brady
vlogger man 223 (1 month ago)
Why you so stupid?
K Håland (1 month ago)
I'm smelly and have wet earwax. Checks out
JWG Fishies (1 month ago)
Biology Texas exam today and watching these as fast as I can. I got 30m
Lizzy (1 month ago)
Anyone else cramming for a biology clep test or is it just me?
Alfy the Betrayed (1 month ago)
2018 anyone?
ZeroCubed (1 month ago)
Ayyy who's watching in 717 AD???
felixhogan23 (1 month ago)
do youknow da wae
Farya Arshad (1 month ago)
polygenic trait: bunch of genes code for a single trait pleiotropic: one gene influences many traits/phenotypes mendelian trait: one gene codes for a single trait polyploid: more than two sets of chromosomes autosomes: non sex chromosome sex-linked inhertiance
Jade O'Connell (1 month ago)
ill be honest you two looks nothing alike like seriously honestly id also say hank looks better cause his brothers hair could use some serious treatment
A E B A- T C P R (1 month ago)
Make a video on earwax.
Kara M. (1 month ago)
Proclivities (1 month ago)
They are just too damn adorable
Paloma Hermosillo (1 month ago)
who ever loves crash course like below
Celine Leon (1 month ago)
this vids never die
BTS AllDayEVERYDAY (1 month ago)
"So, genetics, you guys. Resistance is futile"- his face😂😂😂
Matthew A (1 month ago)
How is sociability and adaptability inherited?
JAme J (1 month ago)
Laila Mohd (1 month ago)
your videos saved my life. Iv never been able to understand genetics. Thank you so much.
Jake Smith (1 month ago)
Thanks John!
Jacobzilla 25 (2 months ago)
I want to learn more
Left anti pc (2 months ago)
I thought these two were father and son.
Totally Patriots (2 months ago)
Bio test next period, pray for me🙌🏻
Totally Patriots (1 month ago)
The Magic Conch C+😒
The Magic Conch (1 month ago)
How did your test go?
Aina Francisco (2 months ago)
I have an exam in two days so here I am cramming on Crash Course huehuehue
Sean Simpson (2 months ago)
I wonder how crazy the other monks thought the dude doing science in his garden all day was. :p
A Bird (2 months ago)
I cannot be the only one in 2018 watching this for Biology????
Fatima Baker (1 month ago)
You're not, I am too
jaafar kais (2 months ago)
Thanks I have a test in one hour
Gabriela Rodriguez (2 months ago)
Gracias te amo 💕
Christian Page (2 months ago)
what is autosomal in terms of genetics?
Vivian Vasquez (2 months ago)
it’s 2018 up in here and we are still doing this ahhhh
Ryan Carter-Johnson (2 months ago)
Paul D (2 months ago)
Anyone still watching 2018?
Stacy Santiago (2 months ago)
so entertaining
Jaig Ventus (2 months ago)
I did this for science class
thomas killer (2 months ago)
I don’t even know anymore
Katie Noiset (2 months ago)
Thanks this helps alot
MyLifeAs Daniley (2 months ago)
2018 and this is helpful
Lil Browns boys (2 months ago)
My mom is white and my dad is black so why am I not grey
CRAZY *TRICKS & MORE* (2 months ago)
Because your dad is technically not black, hes just a dark shade of brown so you would be light brown.
Lil Browns boys (2 months ago)
Hi I'm gay
CRAZY *TRICKS & MORE* (2 months ago)
Alia Mahmoud (2 months ago)
Who"s watching in 2018?
Allan Asomua (2 months ago)
love your videos - but if you're not American - the talking is all a little too fast! (eg: for your Antipodean/European Followers!) I'd use them more often in my classes, etc, but sometime too quick and the kids can't understand what you're saying! (even in English first language classes/countries! - an accent thing perhaps!)
Mark Perez (2 months ago)
Nehemyah Corbim (3 months ago)
*Punnett rectangles
Obi Wan Kenobi (3 months ago)
Who’s watching in 2018?
Joe Vondross (3 months ago)
more like trash course
dogsdogsdogs17 (3 months ago)
i feel like all great scientists who had amazing discoveries lives’ can be described as “they spent an unhealthy amount of time doing _________”
kazi altaf (3 months ago)
My Anth 01 class will be so much comfortable now.!!!
Benito (3 months ago)
Did anyone hear the Romeo and Juliet Overture while the Squirrels were kissing?
Benito (3 months ago)
He has a brother named John????!?!?!?!?!?!?!?!? OMG
Belqis Aldimshawy (3 months ago)
you guys absolutely ROCK :)
Nicholas Gonzalez (3 months ago)
John is bae got me through, apush
TannerMiller (3 months ago)
wooooooow 2012 hank?
Jillian Potter (3 months ago)
Hot Pocket brothers!!!!
Tiana Marshall (3 months ago)
"...and you might poke your brain, or something..."
gossleem (3 months ago)
Can you guys go over Non-Mendelian genetics like incomplete dominance, co-dominance, mitochondrial genes in an added version or short video? @CrashCourse
Nigel Williams (3 months ago)
What is the intro song?
Hannah Hillig (3 months ago)
amazing. thank you.
Ty Fischer (3 months ago)
Small mistake: The dominant and recessive traits should both be written based off of the first letter of the RECESSIVE trait, instead of the dominant one. Therefore 'D'ry earwax (recessive) would be d and wet earwax (dominant) would be D.
Sarah Davis (3 months ago)
Damn John be full of salt
Christi Anne Viljoen (3 months ago)
Resistance is futile.
Sai Kiran (3 months ago)
you dudes are the greatest of all
christalynn m (3 months ago)
this guy always helps me pass my test. but i just can't remember simple vocab. lmao
Conopian Empire (3 months ago)
this is a great way for me to trick my parents into thinking im learning biology, but really it is just entertaiment
Shay Stewart (3 months ago)
Shay Stewart (3 months ago)
your funny
Izzysepticeye McLoughlin (3 months ago)
my teacher plays this guy for 8th grade history every week all the time omg love this guy!
AZcartef (3 months ago)
i have a Question. how does this apply to real life?
Mikey DiCiero (4 months ago)
Science is so amazing!
White Boy (4 months ago)
If men and women have different sex chromosomes what do these undefined people have???? Makes you think😂
Lisa Kokx (4 months ago)
I've been watching these guys since 2013 and now I have to watch this for a uni class I am living
Myrakriz Nebrada (4 months ago)
Can you talk a little bit slower?
Lukas Stifter (4 months ago)
lukas was here
Raeka Tan (4 months ago)
I’ve learned more from this video from an entire semester’s worth of science class. I have an exam in 10 hours. Thank you for saving my grades.

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