All Cockerels (almost)

Bornacentury2L8

Songster
10 Years
Mar 10, 2009
252
5
131
Cartersville, Ga.
In the spring I incubated and hatched a few dozen eggs and they have almost all turned out to be male. Does temp determine the sex? I guess I should know this. I have 1 pullet and 6 cockerels after die-off and giving some away. Oh... anyone need some cockerels.....
 

Mrs MIA

Chick Magnet
11 Years
Mar 3, 2008
7,988
62
303
Nope... if temperature, or shape of the egg, etc, had anything to do with it, the hatcheries would be doing it already.

Just the luck of the draw.
 

wombat

Songster
10 Years
Jun 23, 2009
1,484
6
151
It's a chromosome thing, fairly similar to the XX vs XY in mammals. In birds, males are homogametic (ZZ) and females are heterogametic (ZW). You'll usually get about a 50/50 split, though there are some studies that show that outside factors such as the age of males or availability of resources may provoke a slight skew. No, there's nothing you've done wrong.
 

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