Rose-ringed Parakeet genetic calculator

The calculator covers 18 mutations of the Rose-ringed Parakeet: Blue, Bronze Fallow, Cinnamon, Clearhead Fallow, Cleartail, Dark factor, Dilute, Dominant Edged, Dominant Pied, Grey, Ino, Misty, Non-Sex-Linked Ino, Opaline, Pallid, Recessive Pied, Turquoise, Violet.

In birds, the male has two Z sex chromosomes and the female only one. Sex-linked mutations therefore show differently in sons and daughters: a hen shows a sex-linked mutation as soon as she carries it, a cock can carry it without showing it ("split").

A bird "split" for a mutation carries it without showing it, and can pass it on to its chicks. For dominant mutations, SF (single factor) means the bird carries one copy and DF (double factor) two copies.

They are probabilities: over many chicks the proportions get close to them, but each clutch is a matter of chance. The result is only as reliable as what you tick, so check the genotype of your birds (splits in particular) with their pedigree.

Some traits are not inherited in a predictable way (polygenic or selected traits) or their inheritance is not documented yet in the Birds Evolution catalogue: Mottle.