Mendel's Laws, excerpt 1 | MIT 7.01SC Fundamentals of Biology

Mendel's Laws, excerpt 1
Instructor: Eric Lander
View the complete course: ocw.mit.edu/7-01SCF11
License: Creative Commons BY-NC-SA
More information at ocw.mit.edu/terms
More courses at ocw.mit.edu

[@zingbat77]

This guy is a great lecturer, you can tell he really cares.

[@Ur0pinionDoesntCount]

this guy is the best, i love his lectures and provides really awesome niche context!

[@akshaypuradkar1568]

i just had a feeling this was like the most important segment of the whole class!

[@johntindell9591]

the teaching and sharing are highly appreciated.

[@jigneshthakkar6372]

Sir i just love the way you teach respect from Gujarat(INDIA) sir...

[@user-re8km1lu3v]

Amazing lecturer

[@yaangreece]

Great point made: Dominance and Recessiveness refer to *PHENOTYPES* , *not alleles* !

[@yaangreece]

Great point made: Dominance and Recessiveness refer to *PHENOTYPES* , *not alleles*!

[@daoudaseledieye2609]

Nice presentation of Mendel law. brillant Sir

[@litoid]

there is a blue screen of death, nice use of a laptop there :) thanks for the lessons, i like how you are as a professor. the voice, the movements, the questions, the drawings.. nice! thanks :)

[@Broccoli821]

Great lecture!

[@manishabishnoi9740]

What a nice teacher u are....hats off to u sir.i m glad to attend ur lecture

[@mid7699]

Did you go there?

[@ramharsora6456]

Knowledge express itself...

[@Turtle1967A]

Wonderful lecture :)

[@hossamsouryal7624]

Thanks for the good info

[@EsperanzaUrueta]

Great Teacher

[@malkitsinghbajwa813]

excellent sir

[@LATIFAHMOHDNOR-zy1mq]

Page 361 This so called inheritance of acquired characteristics has never unquestionably been demonstrated to occur and the theory was largely displaced by the genetic theories of Mendel and his successors (see Mendelism).

[@aryan14141]

Great!

[@naremanyahya6426]

So so so nice . I'm from Iraq I like his lectures

[@abidraza2065]

lovely

[@ritobratochatterjee7358]

awesome

[@KSATica]

brother Mendel :)

[@andredaubigny8223]

How much of differences between the rounds and wrinkles being distinguishes as traits or possible could these differences be the first steps towards adaption and evolution?

[@AbhijeetJangale]

superbbbbbbbbbbbbb !!!!!!!!

[@KSATica]

If anyone can answer me this question. How can you tell which allele or whatever let's say circle is dominant while wrinkle is recessive. It all depends on the type of organism or creature. Let's say about the moth. In some locations the moth's color is white and if the location of that particular area is surrounded by tree barks that is similar to the moth's color then its survival chances are less since its prey is some bird then the chances let's say a brown moth would be eaten due to color.

[@yuliang816]

What you talk about is natural selection, another topic. Genetics says what phenotypes can be born, while natural selection says which phenotype can survive. To determine dominant and recessive, you’ve got to cross breed the moths and see the color distribution of the next generation. If (pure) brown crossed with white and all offsprings are brown, then brown is dominant. If all are white, then white is dominant. If the parent generation are not homozygous (pure), then the offsprings would have a brown/white ratio and you can infer the dominant phenotype from the ratio. Whether it is brown or white that gets eaten several days later after born, it doesn’t matter.

[@farahali5754]

ما درستها الا مره مع ريم الشمري ومها عشان لقمه عيش وكانت متوفره في البرامج التعليميه القطريه بعد الكرونا لكن هاي المحاضره ما سمعتها

[@sanshi7]

circle or round is dominant because that is what is prevalent in most pea plant popupaltions and wrinkled ones are in minority. This is under normal environmental conditions and not in the lab. again if a heterozygous plant has one allele of wrinkled and one of round, then that plant will show round seed. hence round is dominant over wrinkled. i hope it helped.

[@KSATica]

I'll be right back. I'm going to pay a little trip to Mexico and Jamica :)

[@KSATica]

And the adaptation of the color of the brown moth would be killed and only the white which is consider the dominant would survive and pass on his or her traits to the next generation. Let's say if by any chance humans interfeared with them and took a little of the brown moths avaibale and white and set them off to another coast to breed and survive. What if the scenario was changed and now Brown is the dominant while white is the recessive. Who is to say which is strong. But it comes down to

[@wasiqamin]

I thought I was sitting in that class in front of you

[@sanshi7]

a particular trait always help an individual to survive best in the environment. So according to the changes in env. the genes specifying a trait which help the species to survive better will be selected by NATURE. If the env. changes too fast for the species to adapt to it....it may not survive.

Now Alright

[@KSATica]

Location of the organism and animals, humans position of location. :0 Wow . I'm starting to like biology now. lol

[@cleodonronaldoregofernande9634]

Is that a high School ou college lecture?

[@mannthakkar2218]

i think high school coz i am in high school in india and i have the approximately same syllabus

[@gabygonzalezyay]

This lecture was done at MIT (Massachusetts Institute of Technology, a college).

[@LuisAguilar-gb9lr]

Speed demon

[@SamsungSamsung-lh4jx]

wtf was 1:19 lmao, he sounds like mickey mouse sometimes, love the guy

[@1985ldiaz]

The video quality sucks, but great information !

[@nibussss]

Round genes ...watered more? Wrinkkly sounds dry... Lol