Karyotypes of partially interbreeding human races

In a non-magical world where homo sapiens has evolved into several races or breeds (like dogs) or even species as in Q10102 and Q12190, that can interbreed for the most part, how can one model the chromosomes or genes to restrict the possible outcomes so each offspring clearly belongs to one (possibly hybrid) race?

Requirements

• Female and male offspring of the same parents may have different races,
  e.g. human mother + vampire father = vampire daughters, human sons.
• A female of one race can be impregnated by a male of another race, but it fails with switched races or sexes,
  e.g. vampire mother + human father = no offspring.
• The race of certain offspring may be determined by the race of the parent with the same sex,
  e.g. dwarf mother + gnome father = dwarf daughters | gnome sons.
• Some races are restricted to a single gender and rely on other races for reproduction,
  e.g. sphinx mother + centaur/minotaur father = sphinx daughters.
• Some hybrid races are infertile when mating with each other, but can reproduce with members of other races (or at least one sex can),
  e.g. human + elf = half-elves, human + dwarf = half-dwarves, both are considered halflings, halfling + halfling = no offspring, but halfling + human = humans (or maybe halflings again).

Which results can be modeled with genetic variety on certain chromosomes and which are better done with different chromosomes?

Q143 "Explaining half-breeds in a world with multiple races" only deals with parts of this question. I guess I'm looking for a general set of rules or algorithm to use.

My current crossbreed design is tabulated at Conworld Wikia. It's not yet specified whether it's the result of natural evolution or of some kind of genetic engineering.

posted about 9 years ago

Crissov‭

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