The crested variety can come with one of 3
crests.
The tuft.
The full circular.
or the semi circular.
Any one can produce the others....
The Crested gene is mostly dominant. We say
this because some birds are born with visual crests and some of
the same clutch might be born showing no crest. (crest bred)
There is only one gene needed to make all the different types of
crests: full (circular) crests, half (semicircular) crests, and
tufts. A budgie with any of these types of crest can produce
offspring with any type of crest, or produce offspring with no
crest at all. Therefore, when a crested bird has a non-crested
baby, we don't say the baby is "split" to crested. We
say it is "crest-bred"
Breeding Crested budgies
To produce them, mate a crested bird with a
non-crested one. If you breed two crested birds together, you get
25 percent birds without crest and 50 percent crested birds (with
a single crested factor). The other 25 percent of the young die
because they have the double crested factor. The preferred cross
(crested x not crested) produces progeny, of which half are
crested and half not crested. (crest bred) The crested x crested
option produces the same percentage of crested birds (50
percent), but the total production of young is diminished by 25
percent. The crest can be improved by continuous selection of the
best individuals.
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