B5.1.8 - The History Of Genetics

Question 1

What did Gregor Mendel discover in 1866?

Answer 1

Characteristics in plants were determined by hereditary units
Hereditary units are passed on from parents, one from each
Hereditary units are dominant or recessive

Question 2

What did Nuclein discover in 1869?

Answer 2

There is an acidic substance inside the cell nucleus (DNA)

Question 3

What did Oswald Avery discover in 1944?

Answer 3

That genes can be transferred from one generation to the next, which shows that genes are made up of DNA

Question 4

What did Erwin Chargaff discover in 1950?

Answer 4

All DNA contain equal amounts of adenine, thymine, cytosine and guanine

Question 5

What did Maurice Wilkins and Rosalind Franklin do in 1952?

Answer 5

They imaged DNA crystals using X-Rays

Question 6

What did James Watson and Francis Crick identify in 1953?

Answer 6

The double helix structure of DNA

Question 7

How many genes have been identified in the human body?

Answer 7

Around 24000

Question 8

What is gene therapy?

Answer 8

Replacing faulty and mutated genes with copies of the gene