Let's assume that the mother is homozygous-recessive in both traits: aabb.
The probability of inheritance depends on the father's genes:
Double homozygous-recessive aabb; probability ~100%.
Double homozygous-dominant AABB; probability ~0%.
Double heterozygous AaBb; probability ~25%.
Mixed AABb, AAbb,AaBB, aaBB; probability ~0%.
Mixed Aabb, aaBb; probability ~50%.
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