How To Solve ANY Pedigree Without Reading the Question (USMLE) 

DISCLAIMER: if parents are affected, the condition could be dominant or recessive. If multiple generations are affected vertically, it's most likely a dominant trait. If it skips generations, it's most likely recessive

This is literally life-saving but I applied this technique to a question & got it wrong because it was following a multifactorial inheritance pattern. So, beware of that! Btw let me mentions some diseases following multifactorial inheritance pattern. Spina Bifida, Cleft lip Cleft palate, Diabetes, Hypertension, CAD, etc.

The diagram on the right could represent either a Dominant or Recessive condition. For example, consider a condition with alleles B and b. If it's a recessive condition, then all bb individuals will display the trait, and BB or Bb individuals will not display the condition. The diagram on the right could be for a recessive condition. In this case the mother would be bb (thus displaying the trait) and the father would be Bb (and therefore not displaying the trait). Their children, by necessity, will be either bb (displaying the trait) or Bb (not displaying the trait). So you cannot rule out the diagram on the right representing a recessive trait.

what about calculating the probability?

If parents are affected it does not always mean its dominant.. Maybe parent was affected because he/she had two Recessive alleles .. Correct me if I am wrong anywhere

these questions are really help full I wish u add some more questions like these

Thank you thank you thank you so much for this! You are amazing!

your videos are life saving thank u soo much

Excellent .. the best i have Ever seen. Please 🙏🏼🙏🏼video about pathology ( Proto-oncogene, tumor supressor genes)

Best pedigree video eveeeeer

you are my favourite person ever

Heyy noor. Your work is truely remarkable. I have one query how to solve pedigree question when you got skip generation in btw I was solving u world ques where their was skip generation in btw and 2as applying your method but was not working. Can you plz brief it

AMZING WORK 🎉!!

Thank you so much. This is really helpful

Genius. Thank you so much.

God bless you, you rlly saved my time❤️❤️❤️❤️

May I ask the question? How did you know the answer was class galactosemia? I'm confused about that part🥶

Thank you so much 😊👍🏻❤️

jazakallah thank you very much

good stuff

Parents being affected doesnt mean it is dominant, the parent could be Homozygous recessive

Wow awesome thanks a lot

Thanks

Thank you noor! Always kind enough to help us with information that will push us forward and make us better! You’re a star!

"dont read the question" bruh... in the question, it says complete penterance... like.. what if it said it wasnt completely pentrate...

I don't believe this is entirely correct. You can have parents that are affected and it still be a recessive inheritance pattern. So am I Missing something here?

thank you this was real helpful!!

Hi Noor. Thanks for helping out with this. Please can you give more tips to easily identify if a disorder is autosomal recessive/dominant or x-link or mitochondria?

❤🎉

This trick is not valid to all example

what a method bro... ap bio help thanks

great content...please make more video about calculate the % in each case ....

this is gold lol

SUPER HELPFUL. BLESS YOU. THANK YOU

This is absolutely WRONG!

big fan, great work! love the questions at the end too

Thank u ,its really helpful

This is helpful for the mcat as well ❤

lifesaver, thank you 🙏

thankyou!!! bio hsc is in two days and i was so stressed about pedigrees but this helped me so much

best video, so simple to understand!!

Great explanation

Thank you❤❤❤

Thank you ❤❤❤

Noor Eweis as always thank you so much. You are an inspiration, you make this stuff fun to learn. Thanks

goated vid

Thank you. It was beautiful and helpfull

Cool vid! The Problem might be mitochondrial....

Omg you literally blew my mind :O! Thank u so much!

Thank you Noor

thanks.

thanks you simplify it this way, very concise :)

So helpful, thank you!

Wrong for several reasons. Paired recessive genes can present in the phenotype. Genes and epigenetics may be present or introduced which mitigate expession . Mutations can and do occur. Genes may render one predisposed to develop issues which never get presented , such as passing away before a development occurs (like... male pattern baldness in teens , telomere reduction etc. )