I am repeatedly seeing authoritative sources on the genetics of budgie
(parakeet) color breeding, state that with budgies the male has two X
chromosomes and the female has just one X chromosome.
This is correct for all birds. Some books say that female birds have an X
and a Y chromosome but I believe that the so-called "avian Y" chromosome is
not considered equivalent to the mammalian one.
--
Ronald I. Orenstein Phone: (905) 820-7886
International Wildlife Coalition Fax/Modem: (905) 569-0116
1825 Shady Creek Court
Mississauga, Ontario, Canada L5L 3W2 mailto:ron.orenstein@rogers.com