Dates and Scientists

Question 0

1952

Answer 0

Alfred Hershey and Martha Chase performed experiments showing that DNA is the genetic material of a phage known as T2

Question 1

1944

Answer 1

Avery and associates studied this transformation property of bacteria

Question 2

1953

Answer 2

Watson and Crick deduced that DNA was a double helix through observations of X-Ray crystallography image of DNA

Question 3

1955

Answer 3

Joe Hin Tijo defines 46 as the exact number of chromosomes in human cells

Question 4

1958

Answer 4

Matthew Melselson and Franklin Stahl demonstrate that DNA replicates in a semi conservative manner

Question 5

1865

Answer 5

Mendel published result of his pea plant experiment

Question 6

1869

Answer 6

DNA (nuclein) discovered by Friedrich Miescher

Question 7

1880

Answer 7

Schleiden + Schwann, using aniline dyes, revealed chromosomes in the nucleus, also develop “cell theory”

Question 8

1900

Answer 8

Mendel’s work rediscovered + confirmed

Question 9

1902

Answer 9

Boveri + Sutton - development of chromosomal basis of inheritance

Question 10

1909

Answer 10

Johannsen coins the word “gene” to describe the Mendelian unit of heredity

Question 11

1911

Answer 11

Thomas Hunt Morgan and his students showed the chromosomes carry genes, and also discovered genetic linkage

Question 12

1928

Answer 12

Fred Griffith was studying Streptococcus pneumonia, which provided insight into the molecule of heredity

Question 13

1879

Answer 13

Walther Flemming describes the process of mitosis