Susan Bush

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@brothercreep 19 күн бұрын

Thank you so so so much! Great teacher, much love

@evb1484 Ай бұрын

Wish I had seen this before my exam :,(

@zahrazulina5830 Ай бұрын

the conclution is even mutation will happen ( cut enzyme that NC can not produce protein cause mutation ) . so i choose , protein synthesis cause ariginin is protein but when i understand deeply . Splicing gen cause mutation and it can deactivation enzym produce each ornitin or ariginin .Sorry iam wrong.

@KiaraBamane Ай бұрын

I'm here an hour before exam

@carol-ug9qo Ай бұрын

This is the best video ever you rock thank you

@DennisGachunu Ай бұрын

Where did the 1.5 ml come from at 7:35 ,

@Life-di2sv Ай бұрын

This is the total volume of reaction mixture in cuvvete

@DennisGachunu Ай бұрын

@Life-di2sv appreciate you 🤝

@SaraBoatman 2 ай бұрын

Very clear! Thank you!

@Corazons-love 2 ай бұрын

Watching 2days before 3rd year final🤲🫶. Thank you miss

@haadikhan8419 3 ай бұрын

This is one of the best explainations I have listened to. Thank you.

@mandudus 3 ай бұрын

Thank you for this video! The walkthrough of the practice problems were especially helpful!

@vrindanarula2764 3 ай бұрын

You’re a great teacher.Thank you ma’am 🙏

@chrisplaymusic 3 ай бұрын

Just for clarification: the BPA diet study on the mouse model, it doesn’t necessarily conclude if low methylation/high methylation is good/bad, right? The main conclusion is that, we see BPA diet can affect the methylation in mouse gene expression of the yellow fur coat gene - which means is just one example of how gene expression can be affected by something like BPA. Would that be correct ?

@SciEdSusan 3 ай бұрын

You are correct: this experiment tells us only that the diet and environment are able to influence genome methylation. The inference would be, the abundance of manmade chemicals and preservatives in our modern world might be having unpredicted (and unpredictable) effects on our genes and thus our health and development...and that of future generations.

@justinbarnes3857 3 ай бұрын

is there a limit of gene size for t region?

@demitriwelling1348 4 ай бұрын

Thanks

@sanjaysinha3203 4 ай бұрын

Awesome video just awesome

@aileneroque8320 6 ай бұрын

This was such a thorough breakdown of this experiment. I was having a hard time making sense of it from the textbook alone. Thank you!

@josephquaye937 6 ай бұрын

Thank you 😊

@andrewabourizk 7 ай бұрын

you explain so so well wow finally

@livlaffluv 9 ай бұрын

THIS WAS SO HELPFUL THANK YOU!!!!

@AbeAli-ry8fb 10 ай бұрын

Is it the samepathway

@AbeAli-ry8fb 10 ай бұрын

In.our book beadle and tatum.experiment lead to.biochemical pathway of niacin

@AmruMagdy 10 ай бұрын

@estrswrld 11 ай бұрын

so so helpful, thank you!!

@HeidyKatherineMunoz Жыл бұрын

Thank you Susan so helpful!

@Flashie_ Жыл бұрын

amazing🐁

@lovesainnts518 Жыл бұрын

i love you.

@ava_mohammadi Жыл бұрын

Thank you very much😍, my professor didn't teach the lactose operon mutation in university, but now I understand the topic completely after watching this video.

@callie6154 Жыл бұрын

Why does the methylation diet not impact the fur color of the mother but is passed on to the offspring?

@emmabuckland1361 3 ай бұрын

I think it's because it is happening during the development of the mouse, not necessarily after the mouse has developed and grown.

@forum_p Жыл бұрын

why is it important to use haploid spores and not diploid of neurospora crassa in this experiement?

@SciEdSusan Жыл бұрын

It's easier to make haploid mutants than diploid ones - you would only need the mutation in one copy (the only copy) of the gene.

@davidfremantle7638 Жыл бұрын

I live in a suburb of Vancouver, Canada and the climate is mild enough for me to grow a "hardy orange" (Poncirus trifoliata) but no other type of citrus. From that youtube video, I can get a list of materials I will need. Where can I get the materials I need, plus the other knowledge necessary? I already have a blender.

@mezmer1380 Жыл бұрын

DDT is organic and showing up in stores with the USDA Organic sticker. DDT was supposed to be globally banned. It's not.

@LarsLarsen77 Жыл бұрын

Organic doesn't reduce chemical use. They still use synthetic pesticides. It's just a feel good bullshit label.

@davidbala436 Жыл бұрын

Very well explained! However, it’ll be nice to explain how the Chi-Square value was derived: perhaps in another video. Thanks!

@rimelius Жыл бұрын

Thank you for this amazing video! May I ask from which book the illustrations are taken from? I'd like to read more and I struggle to find materials about gene regulation problems such as these.

@SciEdSusan Жыл бұрын

Hi Faissal, these images are primarily from Pierce Genetics published by Macmillan. Similar illustrations are in Campbell Biology, Alberts Cell Biology, and most other Cell/Molecular/Genetics texts.

@rimelius Жыл бұрын

Hi Susan thank you so much for your prompt reply, and thanks again for these great videos!

@mahmoudkassem1801 Жыл бұрын

❤❤

@SuperSaiyan-tr7fz Жыл бұрын

2:15 Does that mean sweat potato is actually plant tumour ?

@chitsu1388 10 ай бұрын

No, a sweet potato is actually part of the root system. It's for storing energy

@onkennyj Жыл бұрын

Thanks!

@teeyichen7344 2 жыл бұрын

Thank you so much! You explained so clearly!

@chiragmaan1887 2 жыл бұрын

👌🤌

@JulianNutaj 2 жыл бұрын

god bless you

@hildamwila9217 2 жыл бұрын

So helpful. Thanks

@saifalam7184 2 жыл бұрын

Thanks ♥️♥️♥️

@ritacardoso4413 2 жыл бұрын

thank you so much!!!! :)

@jonathanr2323 2 жыл бұрын

Life saver! I wish my professors were at least half as good as you are

@danielcaley522 2 жыл бұрын

I don't understand where 0.52 and 0.08 come from. Would you not take the square root to solve for p and q?

@SciEdSusan 2 жыл бұрын

0.52 and 0.08 are the expected homozygous genotype frequencies for RR and rr, given the current allele frequencies p & q. We calculate p-squared (freq of RR) by squaring p (allele freq of R) and q-squared (predicted freq of rr individuals) by squaring q (allele freq of r).

@RuJoe720 2 жыл бұрын

@@SciEdSusan I'm not sure what I'm missing here but something is just not computing for me :(

@SciEdSusan 2 жыл бұрын

@@RuJoe720 There are a couple of questions we can ask using the HWE ideas. A common one is, if you know how many white (homozygous recessive rr) individuals there are in a population, then figure out p & q (the allele frequencies of R & r). In that case, usually you DO just take the square root of rr to get q! Here, we’re asking, given all three genotype frequencies, can we figure out if the population is in HWE? So first we calculate p & q, and since we are NOT assuming this pop is in HWE, we include the heterozygotes in the calculation. (We’re not assuming HWE bc we’re trying to test for HWE!) Then, once you have p & q, now you can calculate the expected or predicted values for each genotype, and compare them with what we already have observed in our population, to see if expected = observed. Hope this helps!

@ob7633 2 жыл бұрын

great explanation. Thank you.

@serenamehta6361 2 жыл бұрын

This is super helpful. Thank you!

@rituranikujur4036 2 жыл бұрын

Very nice explanation maam. I have a question that is, I am taking total reaction volume of 250 ul. So while calculating, do i have to convert the value in ml that is.25ml (for example you have taken 1.5ml*1l/1000ml).likewise I have calculate in this manner. 25ml*1l/1000ml, so that ml gets cancel out and left out with mol unit.

@SciEdSusan 2 жыл бұрын

That’s right! You need to cross-cancel to get to moles.

@rituranikujur4036 2 жыл бұрын

Thank u so much maam for your reply.

@rituranikujur4036 2 жыл бұрын

I was taking total reaction volume of 250 ul in calculation and was getting much higher relative enzyme unit. But after taking .25ml , the values I am getting is comparatively very less.

@primeavatar0403 2 жыл бұрын

So will the cell survive if there is z-? Loss of function of LacZ?

@SciEdSusan 2 жыл бұрын

Yes - as long as there's something other than lactose to eat!

@redkritter1225 2 жыл бұрын

Clear explanation that isn’t overly complex.

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