Genetic Recombination, Linked Genes, and Crossing Over

Join our MCAT Study Group: groups/2277468099106607
If you found this lecture to be helpful, please consider telling your classmates and university's pre-health organization about our channel. Don't forget to Subscribe! Thank you :)
Instructor: Dave Carlson
Genetics Part 9 - Linkage and Recombination

[@TheCharliehuddy]

Used pretty much all of your videos to study for the MCAT. I'm now in my second year of Medical school and I'm still using these as a resource for review! Thank you for all your work and dedication!

[@Ibrahimhaxhiu]

Good luck at school (replied because your comment is new in this old video)

[@gfkenya9926]

agreed!!!!

[@FD-rt3rv]

Finally understood linkage, my expensive professor could not do a job as good as this free explanation, thank you!!!

[@samuelnazaroff4653]

Just finished watching all of your videos. Excellent work! Thank you

[@chenwiirene3394]

Exactly what i needed. Thank you

[@sarah_xsms]

So easy to understand, thank you so much!

[@mcmikiy7386]

The best explanation!

[@rohandhanju5843]

thank you sir! That was a wonderful explanation

[@Always_failure1234]

Well explained.....from India🇮🇳

[@geetugupta7244]

I don't even care how long the lecture is if he's gonna be the teacher 🤩😅

[@lovekutsarova662]

helped a lot thank you sm for the video!!!!!

[@diazcoelho]

Oh so handsome and a great instructor. 😊😊

[@winnieahabwe2753]

Thank you so much 😊sure gonna ace this test💃

[@saikatsen2259]

All my doubts sorted sir thankyou 🙏🏻

[@priyanshurautela3581]

Best explanation

[@israchan4474]

Thank you sm ❤️

[@aneeshpunichithaya1638]

Sir,9:13-9:26 ,I didn't catch what you said.
The rest i understood in the best possible manner.Thanks

[@StudentLearning737]

"The likelyhood (possibility) of the 2 genes crossingover separately is inverse to the distance between them." So lets break this down
1. inverse: means that when one goes up the other goes down.
2. in this case chance of crossover is = to recombination freq.
3. Linked genes are less likely to crossover.
4. Recombination freq can is equivalent to gene distance=gene Map unit distance=centimorgan units.
5. Farther apart (large distance) means they have less likely chance of being linked (if on same chromosome)
Heres how to remember this: " The Farther apart you live the less likely you are to cross into one another." (more distance=less linkage)

[@MrBeachwaves]

Is recombination frequency usually expressed between two alleles as in your example, i.e., Eb at 93% and EB/eb at 7%? Thanks!

[@ed7132]

I would assume so. There are probably more complex genetic mapping expressions that might talk about recombination frequencies of multiple genes/alleles, but I think that as a measurement, recombination frequency has to involve at least 2 different genes/alleles

[@divestedkonservativekarame4269]

Recombination is a big thing among black Americans many of us are predominantly white but majority black due to recombination. My dad had chromosomes with 80% Caucasian while being 78% black on the sum of his chromosomes this is how we have white appearing black people this is a great way to explain the black American race in America. Some people assume that it means you have a lot of white ancestry why someone would look mostly white while being black the white ancestor could be very far back and very few it's a matter of recombination because the chromosomes range

[@Matthew9.__]

I cant understand

[@aedanhannabeshoi]

i love the depth of your vids but you build redundancy into your presentation better than codon triplets, i tone out every now and again for a little , rewind and relisten.. but nothing was missed

[@olu4927]

Thanks for watching, I will try to improve upon that in future videos.

[@carsonwhite1329]

thats on you bud its not hard to pay attention for 10 minutes

[@herambrasane6022]

wow😊😊👌

[@samaghazwan7187]

How is the probability of crossing over will occur between two loci increase with the increasing of distance between two loci on the chromosome

[@olaygamer564]

I agree with u in that question..

[@cookingfeveraddict]

Good looking and smart
best linkage😝😝😝

[@muradkhan960]

Sir plet I want more lectures.

[@rahmankhan1410]

excellentttttttttttttttttttttttttttttttttttt.... hats off from pakistan

[@StudentLearning737]

so... if its linked = less likely to crossover?

[@nandini2040]

Yep

[@zujamongullie6544]

Crossover will still be there but the chances of separating the linked genes is very less.

[@JamesJansen-id2mx]

🐐🐐🐐

[@emanazmat13037]

From Pakistan ❤💚🇵🇰

[@malavikab4236]

so linked genes cannot recombine?

[@nandini2040]

They're less likely to, yes

[@Drcarolin8006]

Yes, they can recombine! It's more unlikely

[@clairenandutu3179]

What's this guy's name

[@meredith3556]

Don't you mean genes instead of alleles?

[@otisliu8105]

7th comment