Question

David studying population of mold normally having two copies of each chromosomes (2n = 12). A karyotype analysis reveals a single change in chromosome number: AAA BBB CCC DDD EEE FFF. How should David characterize this slime mold?

a) trisomic
b) monosomic
c) euploid
d) triploid

Answer 1

The mold in David's study, with three copies of each chromosome depicted by karyotype AAA BBB CCC DDD EEE FFF, should be characterized as triploid.

Step-by-step explanation:

David should characterize the mold as triploid because the karyotype analysis shows three copies of each chromosome (AAA BBB CCC DDD EEE FFF) rather than the normal two copies. In organisms that are normally diploid (such as this mold with a normal chromosome number of 2n = 12), having three copies of each chromosome denotes a triploid level of ploidy. This case is neither trisomic nor monosomic, as those conditions refer to the gain or loss of a single chromosome, respectively. A euploid organism would have a normal set of chromosomes, which is not the case here.