sex limited genome transmission In general, for dioecious species, a large portion of the genome passed from parents to offspring of both sexes - in mammals the X-chromosomes and autosomes are passed from a mother to both daughters and sons, and autosomes from the father to both sons and daughters. Only the small amount of genes present in the Y-chromosome and mitochondria are inherited solely within one sex. Is there any species (not just mammals) where most, or even all, of the genome is inherited in a sex-specific trajectory? What is the most sex-limited genome known to researchers?

In birds and reptiles females are the heterogametic sex with allosome configuration `ZW`. However it has been reported that a homogametic `WW` female boa was born by parthenogenesis. So it means that although W is shorter than Z, it can still support life. So I guess that `ZW` system in general exchanges more sex-limited genetic material than `XY` system.

Platypus has 5 pairs of sex chromosomes. See here. This can qualify as the top case of sex-limited transmission.