Question

what did thomas morgan discover about the traits of fruit flies? they followed mendels laws perfectly. they were not associated with chromosomes. they exhibited identical genomes as their parents. they often exhibited linked traits.

Explanation:

1. Analyze the first option: Thomas Morgan's work showed that fruit fly traits didn't follow Mendel's laws perfectly due to linkage, so this is incorrect.
2. Analyze the second option: Morgan discovered that traits are associated with chromosomes (gene linkage on chromosomes), so this is incorrect.
3. Analyze the third option: Offspring have a combination of parental genes, not identical genomes, so this is incorrect.
4. Analyze the fourth option: Morgan's experiments with fruit flies revealed that genes on the same chromosome are linked, so traits often exhibited linkage (linked traits). This matches his discoveries.

Answer:

They often exhibited linked traits.