BIOL 111 Exam 3 People

Question 1

Gregor Mendel

Answer 1

“Father of Genetics” ; independent assortment and law of segregation

Question 2

Fredrich Meischer

Answer 2

First scientist to successfully isolate DNA molecule and show that the dominant molecule in the nucleus was not the protein

Question 3

Pheobus Levene

Answer 3

Determined structure/composition of nucleotides and how they were linked together; found only 4 nucleotide bases in DNA

Question 4

Frederick Griffith

Answer 4

Utilize an in vivo experiment to provide evidence that transformation occurs; determined how living “R” bacteria transformed into pathogenic “s” bacteria

Question 5

Avery, McLeod, and McCarthy

Answer 5

Performed an in vitro study to identify DNA as the transforming principle; Determined that DNA is substance that is transmitted from one generation to the next

Question 6

Erwin Chargaff

Answer 6

Analyzed base composition for DNA; saw that composition of DNA nucleotides are different between differing species, but within a species % of A and T are roughly the same and the % of G and C are roughly the same

Question 7

Wilkins and Franklin

Answer 7

Developed method of x-ray imaging that could detect and visualize molecular structure of DNA; found double-helical structure; responsible for famous “photo 51”

Question 8

Hershey and Chase

Answer 8

Utilized bacteriophages to provide evidence that DNA is inherited from one generation to the next

Question 9

Watson and Crick

Answer 9

Interpreted “photo 51” and developed a working double-helical model of DNA; concluded specific pairing in nucleotides and how base pairs differ the number of hydrogen pairs formed

Question 10

Meselson and Stahl

Answer 10

Tested possible models of DNA replication; found that semi-conservative hypothesis was correct

Question 11

Sutton and Boveri

Answer 11

Developed Chromosomal Theory of Inheritance

Question 12

Thomas Morgan

Answer 12

Fond specific genes can associate with specific chromosomes