Genes, DNA & chromosomes | Heredity & Evolution | Biology | Khan Academy

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Let's learn what genes, DNA & chromosomes are
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Created by Mahesh Shenoy

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Look at that small kid who has changed my life ! THANKS LOT SIR

vaishalisathe

YOU ARE LITERALLY A SAVIOUR! THESE ARE SO MUCH COMPLICATEDLY WRITTEN IN OUR BOOKS AND YOU JUST EXPLAINED IT IN A FAIRLY UNDERSTANDABLE MANNER IN JUST 12 MIN! THANKS, A LOT, SIR JI

darshananath

DNA : DNA is a thread like structure present inside the nucleus that contains instructions to make an organism (and all its parts incluing all the various cells) and its characteristic features.

Chromosome : Long strands of DNA coiled up in a compact form.

Total chromosomes : 46 chromosomes in total (constituting 23 from male parent and 23 from female parent)

Gene: Specific parts of DNA that contain instructions to make a specific protein.

Variation is the most important advantage of sexual reproduction over asexual.

12:28 Enjoyed the lecture very much 😊

Cellate

CRYING SCREAMIMG THROWING UP, THABKYOU SIR SO SO MUCH

Naspotu

HOMEWORK :-
📌 D.N.A is a chemical molecule which carries traits in coded form. These are found in the nucleus of the cell.
📌 Chromosomes are long thread like coiled up D.N.A. which contains hereditary information in the form of gene.
📌 Human cells have 23 pairs of chromosomes OR total 46 chromosomes.
📌 Genes are the part of chronological which controls a specific biological function.
📌 Main advantages of sexual reproduction over asexual are :-
• In sexual reproduction there are two parents involved, due to this the child got two types of DNA, which makes the offspring unique.
• In sexual reproduction, there are high chances of variation which makes life of the species more existable.

kanikadahiya

Excellent video and tuition. As a curious 78 year old found your explanation very clear and easy to understand. Thankyou.

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GaneshKumar-lppw

This guy is so helpful and he explains everything so well

TheSwagDawg

U look so cute in ur childhood ....owwww❤️thnx lot sir for such a great explanation nd u hve got such a soothing nd pleasent amazing 👍

bholashankarprasad

Oh my god.... I've spent 2 hrs trying to figure out tge difference b/w genes.. Chromosomes.. Dna..and not a single person mentioned that dna is what's spread out into 23 strands which are called chromosomes.... I'm so glad i came across this THANKYOU

a_random_atom

I watched all the videos on YouTube of this topic but the only one by whom I understood the concept was you sir thanks a lot lot and lot sir❤️❤️🙏

snehasalunkhe

The everbest teacher i have ever met
hats off sir

Clive.kut

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bksarita

I studied this for months and couldn't understand why one trait dominates the other... But watching this video one day before board exam helped me understand the concept ☺️✨👏👏👏

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