Modern Genetics - Scientists

Question 1

Griffith

Answer 1

Used two strains of pneumococcus bacteria (one kills mice = s, one was harmless = r)

Live harmless bacteria (R) * dead bacteria (S) = harmful (pathogenic) bacteria

Question 2

Chargaff

Answer 2

Chargaff’s Rule: the amounts of C=G and A=T

Question 3

Hershey and Chase

Answer 3

• virus are made of protein coat with DNA/RNA on the inside

- viruses attach to cells and injection DNA

Question 4

Rosalind Franklin

Answer 4

• took x ray pics of DNA

- DNA shows circular pattern from certain angles

Question 5

Watson and crick

Answer 5

• two chains wrapped around each other (double helix)
• hydrogen bonds hold together strands
• two strands are complementary

Question 6

Miescher

Answer 6

Found a white substance in nuclei from human pus and fish sperm…thought it was only structural