Genetic Recombination and Gene Mapping

In this video Paul Andersen explains how the frequency of recombination between linked genes can be used to determine the relative location of genes on a chromosome. Thomas Hunt Morgan and Alfred Strutevant used the fruit fly to develop a theory of chromosomal inheritance and discover crossing over.

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Music Attribution
Title: String Theory
Artist: Herman Jolly

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[Tomozaurus]

I swear these videos are 100% times better than the actual lectures from my university-run units. They should just show these.

[samaalnassiry]

I haven't watched Bozeman science since my senior year of HS AP biology class. Here I am, 5 years later in college watching him again. Thanks for getting me one degree and on the way to the second.

[kirillkondrachov]

Exam tomorrow, and I now understand all of this. Bless your soul.

[AlmostAnything]

HELPFUL ? IT WAS WAS MORE THAN HELPFUL

[jsscmoran]

Dear Lord... i learned more in this video than in two lectures ...thank you

[hydrogenperoxide]

The fact that i understand more about the whole chapter in this 10 minute video than my one and a half hour of lecture is amazing

[zoemccall]

I was first introduced to your videos as a freshman in high school, during my neuroscience class, and now I'm a freshman in college and I still like coming back to your channel:)

[Jo-gjnr]

It’s 1 AM the night before my AP bio exam, my bio teacher has spent the entire semester talking about her kids instead of teaching us, I want to thank you for being my bio teacher

[lauramorganti]

Just wanted to say thank you. I watched this video the night before my genetics exam because I was so confused and I scored 100% 😂🙌🏼

[skennedy]

I always use Bozeman science when I am stuck on something from a lecture at uni, helps me understand it in a better light and furthers my learning greatly.

[blessdog]

Blows off his homework. FIres up his pipe, and figures the whole thing out. Studivent was bad 2 the bone

[mayabalaji]

Mr. Anderson, Thank you so much for taking the time to post some of the most helpful science videos on youtube! Your time means the world!!

This video helped me a lot. I just have to consider some issues about the distance of B-A and A-D. Thinking of it mathematically the distance between B-D from the given data is equal to 55 map units which on that note it should be independently assorted.

It must have been 10 map units between A-D which would make total sense and the reordering of the gene map. I have to thank you Bozeman for letting us think critically and curiously <3

[TamangCA]

for the last gene mapping part. if B to C is 45%, isn't it impossible for A - B (30%) and A-D (25%) to be bigger than 45%? 

[vasenainaiteqe]

I have my genetics exam tomorrow and this video has really help in thoroughly understanding Chromosomal Inheritance and recombination.

Vinaka
Fiji Islands

[orangecaprinun]

It is customary to like your video before it even starts at this point, THANK YOU SO MUCH Prof!

[tomvolpe]

Great video!  Two comments.  1) 50% recombination doesn't necessarily imply the genes you're mapping are on different chromosomes. The could just be far apart on the same chromosome or have a recombination hot spot between them.  2) When you discuss recombination between the b and vg you have a green box labeled recombination and red boxes above and below labeled no recombination.  I know what you mean but students may think that there is no recombination occurring in these regions.  It may be but you just can't see it with the alleles you are tracking.
Thanks again for all your hard work making these videos.  They are extremely helpful. 

[desertman]

I've taken a number of courses with this concept and did well enough on the tests, but it was only as I watched this video that it really began to truly make sense

[ladinonyc]

For someone like me. Besides reading the text book( which I don't get) to later watch a video.Your video helped give me a better image of whats been spoken about in class.Thank you.

[rev]

This less than 10 minute video just helped me understand what my teacher tried to teach me in a 1.5 hour lecture.