DNA as genetic material

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After watching this video you will able to understand the early discoveries and experimental proof for recognizing DNA as Genetic material.

We have covered following points in this lecture.

00:27 Outline
00:47 4 requirements for genetic material
01:05 1869 Friedrich Meischer extracted acidic material from nuclei
02:08 1928 Fredrick Griffith's experiment, Transformation R strain to S strain of Streptococcus pneumoniae
06:46 1944 Avery, MacLeod and McCarty' experiment
10:23 1952 Hershey Chase Waring Blenders experiment Radiolabeled P32 and S35
12:29 Rosalind Franklin and Maurice Wilkins X-ray diffraction pattern plate 51
13:44 Chemical composition of DNA 4nucleotides joined by phosphodiester bonds
14:32 Erwin Chargaff complementary nucleotide A=T, G=C joined by H-bond
15:05 1953 Watson-Crick DNA double helix model, antiparallel, polar, 5' to 3' B-form of DNA
17:11 Other forms of DNA

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Fundamentals of Forensic Biology

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Regards
Sandeep Sangle
Assistant Professor-Biology
Government Institute of Forensic Science
Aurangabad Maharashtra
GIFSA

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