Final answer:
A coefficient of coincidence value of 1.0 in a three-point linkage analysis indicates that no double crossovers were observed in the progeny.
Step-by-step explanation:
A coefficient of coincidence value of 1.0 in a three-point linkage analysis indicates that there were no double crossovers observed in the progeny.
Double crossovers occur when two crossovers happen between three linked genes, resulting in the restoration of the original gene order. A coefficient of coincidence of 1.0 means that the observed number of double crossovers matches the expected number, suggesting that there were no double crossovers observed.
This suggests that the genes involved in the linkage analysis are close enough together on the same chromosome that double crossovers are very rare or do not occur at all.