The scenario you described, where more male mice have the allele for long tails and more female mice have the allele for short tails, suggests that the tail length traits are influenced by their sex. This pattern of inheritance is indicative of sex-linked inheritance.
In sex-linked inheritance, the genes controlling certain traits are located on the sex chromosomes, which leads to differences in expression between males and females. Therefore, the correct response is:
sex-linked inheritance.