Chromosomes and genes | Inheritance and variation | Middle school biology | Khan Academy

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Genes are located in the chromosomes of cells, with each chromosome pair containing two variants of each of many distinct genes.

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Credits:
“Cute Puppies @ December 20, 2015 at 09:36AM” by Cute Dog Wallpapers [Public domain], via Flickr:
https://www.flickr.com/photos/1362927...

“Puppy” by Saran Chamling [Public domain], via Flickr:
https://www.flickr.com/photos/7318474...

“I give up....I surrender to your power and strength" by Beverly & Pack [Public domain], via Flickr:
https://www.flickr.com/photos/1010104...

“20190405-OSEC-LSC-0229" by Lance Cheung, USDA [Public domain], via Flickr:
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“DNA rendering" by ynse (CC BY-SA 2.0), via Flickr:
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https://creativecommons.org/licenses/...

Cell, chromosome, and DNA diagrams created with Biorender.com:
https://biorender.com/