Mutation pairing
calculator
Set the genotype of the cock and the hen and see what the clutch can produce, split by sex, with the Punnett square behind every figure. Free, no account, twelve species.
Runs the same inheritance engine as the AviLedger app: autosomal recessive and sex-linked recessive loci, with hens hemizygous on the Z chromosome.
No curated mutation panel for this species yet. Email admin@aviledger.com with the loci you work with and we will add them.
How closely are these two related?
Wright's coefficient of inbreeding, F, is the probability that a chick inherits two identical copies of the same ancestral gene. The app computes it from your recorded pedigree eight generations deep. Pick the relationship here to see where a pairing sits.
Sex-linked, in one line
Cocks carry two Z chromosomes, hens one Z and one W. A hen cannot be split for a sex-linked mutation: she either shows it or she does not. A split cock passes it invisibly to half his daughters as visuals.
Autosomal recessive
Both parents must carry the gene for a visual chick. Two splits give one visual in four on average, and two more splits that look completely normal.
Percentages are averages
A 25% result does not mean one chick in every clutch of four. Over a season across several clutches the ratios settle; a single nest can do anything.
Run this against your own birds, with the pedigree filling itself in.
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