> Producing more females when there's a shortage of males doesn't seem to be a particularly useful trait Given that mammal females are XX and can only partheno

> Producing more females when there's a shortage of males doesn't seem to be a particularly useful trait Given that mammal females are XX and can only parthenogenesize females, never males, because of the lack of any Y chromosome, perhaps that's why mammals don't reproduce asexually frequently compared to ZW birds and other ZW animals.