Question 1
The one-gene:one-enzyme hypothesis emerged from work on which two organisms?
◦
E. coli and humans
◦
E. coli and yeast
◦
Drosophila and humans
◦
Neurospora and
Drosophila◦ All of the answers listed are correct.
Question 2
By their experimentation using the
Neurospora fungus, Beadle and Tatum were able to propose the far-reaching hypothesis that ________.
◦ more than one codon can specify a given amino acid
◦ several different enzymes may be involved in the same step in a biochemical pathway
◦ the role of a specific gene is to produce a specific enzyme
◦ genetic recombination occurred in
Neurospora◦ prototrophs will grow only if provided with nutritional supplements
An indoor mould fungus.
The linear meiosis of Neurospora
Stages of a Neurospora cross
Fungus
Ascocarp: Scarlet Cup Fungus
Jelly fungus