Hinny to the action of imprinted genes." A male hinny is properly called a "horse hinny", and a female hinny is properly called a "mare hinny", though in British English both female hinnies and female donkeys are sometimes called "jennets". Hinnies are difficult to obtain because of the differences in the number of chromosomes of the horse and the donkey. A donkey has 62 chromosomes, whereas a horse has 64. Hinnies, being hybrids of those two species, have 63 chromosomes and are sterile. The uneven number of chromosomes results in an incomplete reproductive system. According to the ADMS: "The equine hybrid
Cryptic female choice in which a male's interaction with a female is of detriment to her personal well-being and that of her offspring, one such situation occurs when a male harasses a female prior to copulation. In such circumstances where the female's lifespan and fertility are compromised, it benefits females to develop evasive mechanisms. In addition, in some species where multiple males inseminate a female, a female is able to select the most desirable sperm for her offspring by rejecting that which she desires less. In both of the aforementioned situations it is a female's reproductive actions that affect male reproductive success following