T. H. Morgan and his group found that among the offspring of genetic crosses, parental phenotypic classes were the most frequent, while recombinant classes occurred less frequently. This observation led Morgan to conclude that
A) genes on different chromosomes do not assort independently.
B) alleles of linked genes assort independently.
C) genes on different chromosomes assort independently.
D) all genes are linked.
E) alleles of some genes assort together.

Question

Quizplus · Accepted Answer

Morgan's observation that parental phenotypic classes were more frequent than recombinant classes led him to conclude that alleles of some genes assort together, which is consistent with the concept of linkage.

T H Morgan and His Group Found That Among the Offspring