Discussion:
Diagram it on chromosomes
In Aspergillus, the genes y (yellow), os (osmotic), c (colonial), leu (leucine-requiring), and a (aconidial) are located on the long arm of chromosome 3. A diploid was made between a haploid wild type and a haploid of genotype y os c leu a. From the green diploid, yellow diploid sectors appeared. When these were sampled and tested, the following was found:
56%were yellow, osmotic, aconidial, and leucine-requiring 40%were yellow, osmotic, colonial, aconidial, and leucine-requiring 4%were yellow, aconidial, and leucine-requiring
(a) What is the origin of the three types of yellow sectors? (Diagram it on chromosomes)
(b) What is the order and relative map distances of the five loci?