Lec 7 | MIT 7.012 Introduction to Biology, Fall 2004

[JTS11d6]

Watching this lecture in AP bio when the teacher was absent, the whole class thought the boards were funny and kind of unnecessary.

[josegustavo1986]

What a wonderfull contribuition to enlightining from MIT. Thanks to the good folks in Massachusetts.

[Danpower101]

Thanks for putting these up. I'm a first year UK student needing some revision + these are concise and engaging. Nice one!

[philosophicalleo405]

17% Hmm sounds almost like a 6th.

17% + 17% = 34%

Stop me if im well wrong but Mendell's

1-3 rule? still stands pretty firm.

Seems like twice the calculation

i would expect to double the odds.

instnt pi like 3 to 1

Does the heisenburg uncertaintity principle still apply in genetics?

thaaankyou!! mit

Science is fun

[savvvvvvvvvvy]

@philosophicalleo405 Heisenberg is only quantum mechanics; if you can see it on a microscope, it certainly isn't quantum. People always try to apply obscure physics principles to the simplest things as a means of trying to show how much they know, but they inevitably screw up. The only quantum theory you will ever encounter in biology and chemistry is schroedinger's wave function equation.

[JTS11d6]

@philosophicalleo405 You have no idea what you are talking about. the 17% is the rate of recombination. You can't just double it to make it close to 3:1. Which isn't even the recombination rate. You can't just create data to suit your needs, you have to reach the conclusion through experimentation. If the 3:1 was true then there would be 25% homozygous dominant, 50% hertozygous, 25% homozygous recessive. Maybe you should listen to the whole lecture.

[dothedeed]

@philosophicalleo405 Heisenburg Uncertainty principle in genetics!!? LMAO

[ibnusayid10]

Thanks MIT

[baptistic]

What's that about "how many go for Mendel? how many go for chromosomal theory?" dude, Mendel's 2nd law is the case of chromosomal theory when genes are inherited separately (no linkage), either because they are on different chromosomes or because they are too far apart within a chromosome. You can't possibly say "mendel is wrong" or "chromosomal theory is wrong",since they do not contradict each other.

[calvinhobbesliker2]

what if genes are close on a chromosome?

[JTS11d6]

@calvinhobbesliker2 Then they will be associated. For arguments sake, lets assume that the genes for deformed wings and white eyed flies were next to each other in the chromosome. Then these two traits would almost always be associated.

[baptistic]

Even though Eric Lander knows his stuff really well, he doesn't do a great job explaning it. I think his explanation is a lot foggier and more confusing than what you could get in a textbook.

[vedg007]

nice.excelant..please upload some more.these videos are very help full for a M-Pharm student like me.Biotechnology is an important subject in our syllabus.

[SpeciationEverywhere]

I like what he said about sex chromosomes

[mungojoel]

any possibility of getting this uploaded again?

[cosmoHBK]

yeah~ first.