Depends on the plant. I do know of plants (eg Dtps. I-Hsin Chocolate =
P. Ever-Spring King x Dtps. Leopard Prince), from which will emerge
multiple spikes, each with completely different flowers. The separate
flowers on each spike resemble each other, however. It's really quite
fascinating and interesting to see. Trace the flower spikes on your
plant until they meet up with the leaves, ands see if they emerge from
the same stem.

Check out Dtps. I-Hsin Chocolate
http://bigleaforchids.com/newsletter/may2005.htm

Cheers,
Xi