Phenotypes are hatched in batches?

[wsimms at fas.harvard.edu]

In article <89mgka$bf6$1 at mark.ucdavis.edu>, "Carmen L. Abruzzi" <Abruzzi at some.org> wrote:
> 
> ----------
> In article <QNrv4.1268$SV6.27865 at news3.cableinet.net>, "Jason
> Muir" <jason.muir at iname.com> wrote:
> 
> 
>>I've noted that Drosophila seem to emerge from pupae in batches of 
>>different
>>phenotypes.  Can anyone suggest whether this might be because the eggs 
>>are
>>laid down in that order, or whether particular fly types hatch from 
>>their
>>eggs more quickly?
>>
> Mutants may develop at different rates from wild-type, thus
> affecting the time of eclosion.  I do not think there's any
> mechanism for differential laying time.

Just as a formal possibility....

Some chromosomes have been around for a long time and there could
be possible selection for "fast eclosure" by decades of taking the first 
flies for the crosses.  I have no evidence to support this statement.  

The response above is the most reasonable.