Difference Between Chick Down of ER vs. E Blues

[Steve Neumann]

Are there differences in chick down between Blues that are ER, E, and ER/E or do they all look the same?

[John W Blehm]

Chick hatch down, by blackdotte

E - Extended black
The down is black on the dorsal and lateral surfaces,
whilst the ventral surfaces and the wing tips are cream-colored or
white. Homozygous chicks often have a small white dot on each side of
the lower foreface.
ER - Birchen
The down resembles that of E, although the non-black area on
the ventral surfaces may be reduced in some cases. The head may be brownish.
...Note: These descriptions are for the genes in the absence of other colour-changing gene, many of which alter the above colour description quite dramatically,
David

Also this thread may be of interest...
http://ameraucanaalliance.org/forum/index.php?topic=108.msg767#msg767

The E locus Chicken/Down Colour Pattern

• E (Extended Black) –black/cream day-old chicks, adults predominantly black, but may have some pheomelanin (silver or gold) areas in hackles.
• ER (Birchen)- black/cream day-old chicks, adults predominantly black, but may have more pheomelanin (silver or gold) areas in hackles, wing bows, etc.
...Dr Ron Okimoto..."...The most dominant E allele has varied expression in down color. Some chicks are black with gray bellies, and other show varying amount of cream color on their undersides. This color seems to be due to other genes than the E locus because I get both types of chicks with the most dominant E allele."

[Steve Neumann]

Thanks.  I now have lots of head scratching to do.

[Russ Blair]

Lol don't feel bad I have to take small doses when it comes to genetics. I found if I read to much at once I get more confused lol