Lemme help y'all out: Natural selection is: the gradual process by which heritable traits become either more or less common in a population because pressures from the environment Directional Selection is: when individuals that display a more extreme form of a trait have a greater fitness than individuals with average form of the trait. Stabilizing Selection is: when the individuals with the average form of a trait have the highest fitness. Disruptive Selection is : when individuals with either extreme variations of a trait have greater fitness than individuals with the average form of the trait. Your welcome
It is important to also understand that you need three requirements in order for natural selection to occur: 1) Phenotypic variation: Without variation natural selection can't "select" different phenotypic values, and therefore the population cannot change. 2) Non-random association between phenotypic value (individual phenotype) and fitness (capacity of survival). If there isn't a force (like the ones she mentioned) pushing for one phenotypic value to have higher fitness, evolution by NS will not occur, this is also known as "selection". 3) Heritability: If the phenotypic value cannot be heritable, then the gene cannot be passed to the next generation, and evolution by NS cannot occur.
So basically in stabilizing selection,the mean of the population remains unchanged,we just have more individual that express the mean trait.Whereas in directional selection the mean is shifted in the opposite direction from the trait that is selected against.And in disruptive selection,we end up with 2 means with a trough in between,on either side of where the mean would have been had the distribution been normal(like in stabilizing selection).
Simpler conclusion: directional selection - only one can survive Stabilizing - smallest and biggest can’t survive, only the middle can survive Disruptive - middle can’t survive, but the smallest and biggest can survive
Please can you answer my question. What is the difference between stabilizing selection and disruptive selection. Because the way you and my teacher explained it sound the same. . . . . I might have an idea the difference please let me know if I'm correct. So stabilizing favors the popular traits in a population and disruptive favors the rare and popular traits in a population but not the average. . Please reply with an answer if i'm correct because I don't want to confused Thank You.
If you had an organism that could have its genetics changed at will by an outside force, say a mad scientist, but at the cost of not being able to reproduce, only rebuilt, starting as something akin to a single cell, what selection factors would still affect the organism? The need for energy The need to move to the energy source The need to notice changes in its environmental ... And are these called "selection factors" or should I be looking for a different term? Thankyou
Bruh I had no idea what the teacher was talking about, but when I came here I understood. Thank you Teacher pet (Btw "Teachers pet" sounds like an insult tbh)
+Henny Williamson Basically as a result of disruptive selection you are expected to find either very large or very small chinook salmon males, no intermediate ones, so yeah both I guess.
both. The small and big fish will be the most common and have a larger frequency. Maybe after many many years, the medium sized fish will completely die out
I appreciate that you are trying to educate people about the process of natural selection. However, I'm afraid that the distinctions you are making are artificial and actually superimpose unnecessary complexity on to the otherwise sublimely simple principle of natural selection. There is only one type of natural selection. The consequences of the principle of natural selection produces populations that exhibit different types of EVOLUTION.
clean cut info in just 2 minutes! Thank you for uploading! (:
taebae hey army😂😂
Na that shit is so confusing
So Bio exam ??
Yep
Tomorrow actually 😃
im cooked 🧍🏽♂
Makes it quick and simple 👍And examples make it understandable. Thanks!
Lemme help y'all out:
Natural selection is: the gradual process by which heritable traits become either more or less common in a population because pressures from the environment
Directional Selection is: when individuals that display a more extreme form of a trait have a greater fitness than individuals with average form of the trait.
Stabilizing Selection is: when the individuals with the average form of a trait have the highest fitness.
Disruptive Selection is : when individuals with either extreme variations of a trait have greater fitness than individuals with the average form of the trait.
Your welcome
thanks
thanks!
thank you
I'm confused, what's the difference between directional and disruptive selection?
I like how you know all that but can't spell "you're" right bahahaha
omg...dis was d fabulous channel ever watched!! made all concepts crystal cleared in 2 mins
i could not for the life of me understand this when it was taught. this is so simple and helpful. Thank you!
Very helpful. I enjoyed the clear definitions and the visual examples with graphs. Highly effective!
this was so helpful before my exam, short sweet and to the point
Straight and to the point. Loved it.
Love videos like this. Clear, precise and to the point. Thank you so much!!! Please post more!!
This helped me so much in my exam, THANK YOU
So simply explained! Thank you!
It is important to also understand that you need three requirements in order for natural selection to occur:
1) Phenotypic variation: Without variation natural selection can't "select" different phenotypic values, and therefore the population cannot change.
2) Non-random association between phenotypic value (individual phenotype) and fitness (capacity of survival). If there isn't a force (like the ones she mentioned) pushing for one phenotypic value to have higher fitness, evolution by NS will not occur, this is also known as "selection".
3) Heritability: If the phenotypic value cannot be heritable, then the gene cannot be passed to the next generation, and evolution by NS cannot occur.
Excellent explanation and easiest one.. thanks.😇😇😇😇😇
Very well explained dear.. It helped me to explain my sister in her education. Thank you so much dear..🤗
Wow, very helpful. u just told the whole thing in just 2 minutes !!
Thank you for this simple explanation!
thanks so much! i’ve got a bio test tomorrow
2 mins and great info thanks
very clear cut and informative video! Glad I found out about your channel!
Great teaching and great examples!
U r awesomeeeee 😘😘😘😘 POV u sis from Pakistan 🇵🇰 I was so worried about it I have never caught my teacher at it...tnx a lot 🤠
Very clear! Make more bio videozzzz!!! PLEAAAZZZ)
The intro song is a BOP lmao
rightttt
This video saved my life
Great video! Really explained these concepts well.
Nice and comprehensive.
Great video 👍
Short but effective...to th point..thank you
one of the best i have ever seen
So basically in stabilizing selection,the mean of the population remains unchanged,we just have more individual that express the mean trait.Whereas in directional selection the mean is shifted in the opposite direction from the trait that is selected against.And in disruptive selection,we end up with 2 means with a trough in between,on either side of where the mean would have been had the distribution been normal(like in stabilizing selection).
Simpler conclusion:
directional selection - only one can survive
Stabilizing - smallest and biggest can’t survive, only the middle can survive
Disruptive - middle can’t survive, but the smallest and biggest can survive
I have never felt this amount of rage until I had the wonderful idea of trying to understand bio
Love it! Big help, appreciate it!
An amazing video. But the theme song is a bit loud 😂
Thank you so much for this video 😃 Would be very helpful for my bio test👍
Very well explained. Loved it
mz jacks bio class wya !!!
Beautifully explained
so straightforward it helped a lot
I like the starting tune.
very informative thanks!
Thank you for this
The stuff people categorize is crazy.
Wow super......
Good stuff!
Omg this was so helpful thank you!!
Teaching me everything my bio teacher doesn’t thank you 😭
damn the intro though
lmao ikr
lmao ikr
Telugu lo pettandi
Please can you answer my question. What is the difference between stabilizing selection and disruptive selection. Because the way you and my teacher explained it sound the same.
.
.
.
.
I might have an idea the difference please let me know if I'm correct. So stabilizing favors the popular traits in a population and disruptive favors the rare and popular traits in a population but not the average.
.
Please reply with an answer if i'm correct because I don't want to confused
Thank You.
Omg thanks for the examples ✿
Very concise and helpful!
Loved this
Excellent
Perfect
This helped me so much! Thank you for uploading this!
Boom. There it is
If you had an organism that could have its genetics changed at will by an outside force, say a mad scientist, but at the cost of not being able to reproduce, only rebuilt, starting as something akin to a single cell, what selection factors would still affect the organism?
The need for energy
The need to move to the energy source
The need to notice changes in its environmental
...
And are these called "selection factors" or should I be looking for a different term?
Thankyou
thank you!!! this is so helpful :)
Right on!
this helped a lot ... thanks 😃
Thanks for this
Thanks! :)
shhh
omg thank you!!!
Best
This is great
Bruh I had no idea what the teacher was talking about, but when I came here I understood. Thank you Teacher pet (Btw "Teachers pet" sounds like an insult tbh)
great name for the channel though...
good video
Helpful
Thanks
"if they are eaten, they cant reproduce" :P
Or can they?
*Moon men plays*
Water Bears: Hold my beer
Water Bears: Hold my beer
awesome
I need to know that beginning song
Very helpful :)
I like the intro ;)
Clear concept in 2 minutes.b
Awesome intro :D
thx....much help🥰
This was really great but I don't really understand the difference between directional and disruptive, they are so similar. Sorry I'm not very smart
Nevermind I get it they are just very similar
sooo...what happens to the chinook salmon males? are they either super large or super small or both???
+Henny Williamson Basically as a result of disruptive selection you are expected to find either very large or very small chinook salmon males, no intermediate ones, so yeah both I guess.
both. The small and big fish will be the most common and have a larger frequency. Maybe after many many years, the medium sized fish will completely die out
THANK YOUUUUU
what does the green line represent?
Totally nit-picky of a comment, but you can break Hardy Weinberg Equilibrium without Natural selection occurring (ex. migration, genetic drift, etc.)
lit intro
noice
👏👏
2 mins lecture gave me the "concept". But i was watching a 2 hour lecture of natural selection gave me nothing just a bunch of datas!
Fine as fuck
her voice is kinda asmr
I'm doing this for 8th-grade science, anyone else?
Seems like bio 11 also learns the same thing
tuff
adhbutha
0:14
mr loconte GM 🙎🏿♂️🙎🏿♂️
thanks for a straight forward ass video. no need for a bunch of extra bs that doesn't get to the point.
I appreciate that you are trying to educate people about the process of natural selection. However, I'm afraid that the distinctions you are making are artificial and actually superimpose unnecessary complexity on to the otherwise sublimely simple principle of natural selection. There is only one type of natural selection. The consequences of the principle of natural selection produces populations that exhibit different types of EVOLUTION.
Who else is here Bc of class
ahaha.....so no kiss ?