In article ,
Jeff Layman wrote:

Any explanations for the variation in colour, and the 5:1 ratio?

Some plants do that, but I don't know why. In others, it can be an
indication of flower colour or some other interesting property.
However, 5:1 is as likely as any other ratio, because the optimal
level of a gene in a population can be almost anything. Also, in
60 plants, 5:1 is not significantly different from 4:1, which is
the proportion that an equiprobable recessive gene exposes itself.


Regards,
Nick Maclaren.