In high school biology, we learn that humans are born with either XX or XY chromosomes, and that a person’s internal and external sex organs match those chromosomes. It turns out, however, that sex isn’t that straightforward. Hosted by: Hank Green SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at www.scishowtangents.org ---------- Support SciShow by becoming a patron on Patreon: www.patreon.com/scishow ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Eric Jensen, Matt Curls, Sam Buck, Christopher R Boucher, Avi Yashchin, Adam Brainard, Greg, Alex Hackman, Sam Lutfi, D.A. Noe, Piya Shedden, Scott Satovsky Jr, Charles Southerland, Patrick D. Ashmore, charles george, Kevin Bealer, Chris Peters ---------- Looking for SciShow elsewhere on the internet? Facebook: www.facebook.com/scishow Twitter: www.twitter.com/scishow Tumblr: scishow.tumblr.com Instagram: instagram.com/thescishow ---------- Sources: www.ncbi.nlm.nih.gov/pmc/articles/PMC5479330/ www.isna.org/faq/what_is_intersex www.hrw.org/report/2017/07/25/i-want-be-nature-made-me/medically-unnecessary-surgeries-intersex-children-us www.scientificamerican.com/article/the-spectrum-of-sex-development-eric-vilain-and-the-intersex-controversy/ ghr.nlm.nih.gov/gene/SRY#conditions www.who.int/genomics/gender/en/index1.html www.wired.com/story/trumps-plan-to-redefine-gender-makes-no-scientific-sense/ www.nature.com/news/sex-redefined-1.16943 www.intersexequality.com/how-common-is-intersex-in-humans/ www.isna.org/faq/ten_myths/rare onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2265.2008.03392.x my.clevelandclinic.org/health/diseases/16324-disorders-of-sex-differentiation www.sciencedirect.com/science/article/abs/pii/S1521690X07001054 www.med.umich.edu/yourchild/topics/dsd.htm blogs.scientificamerican.com/sa-visual/visualizing-sex-as-a-spectrum/ blogs.discovermagazine.com/crux/2018/11/16/evolution-human-body-skeleton-sex-gender/#.XVYRf5NKjBI massivesci.com/articles/sex-gender-intersex-transgender-identity-discrimination-title-ix/ childrensnational.org/visit/conditions-and-treatments/diabetes-hormonal-disorders/differences-in-sex-development www.nationwidechildrens.org/specialties/thrive-program/differences-of-sex-development www.bloodjournal.org/content/102/10/3465?sso-checked=true www.nytimes.com/2015/09/15/science/a-pregnancy-souvenir-cells-that-are-not-your-own.html www.nadf.us/adrenal-diseases/congenital-adrenal-hyperplasia-cah/ www.nhs.uk/conditions/disorders-sex-development/ aisdsd.org/resources/youth/youth-faqs/ www.rchsd.org/programs-services/endocrinology-diabetes/services/differences-of-sexual-development-clinic/ www.ncbi.nlm.nih.gov/pmc/articles/PMC5682373/ www.seattlechildrens.org/clinics/differences-sex-development/ www.fairview.org/patient-education/40119 www.mayoclinic.org/diseases-conditions/congenital-adrenal-hyperplasia/symptoms-causes/syc-20355205 www.ncbi.nlm.nih.gov/pubmed/29606626 www.ncbi.nlm.nih.gov/pubmed/23045263 Image Sources: commons.wikimedia.org/wiki/File:45,X.jpg commons.wikimedia.org/wiki/File:PBB_Protein_SRY_image.jpg commons.wikimedia.org/wiki/File:Pseudoautosomal_region.png commons.wikimedia.org/wiki/File:Androgen_receptor_3-d_model.jpg commons.wikimedia.org/wiki/File:NHGRI_human_male_karyotype.png

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