Yup, it`s in flash, and it`s a long wait `till it loads.i think the site is in flash,Maybe you shoud check your browser support for flash
What if an individual with 62 chromosomes mates with an individual with 66 chromosomes? Then the hybrid will have 64 chromosomes, which means the chromosomes can separate at meiosis (32 on one side,32 on the other),and so it will not be sterile, right?
Actually, the reproduction stage isn`t nullified, and the hybrid can actually be produced (theoreticly;it`s still a matter of circumstances). The usual problem is that the hybrid is sterile, and thus it`s existince can not pe perpetuated (it can not mate with others of his species, or any other species, and thus the created hybrid species will dissapear).I though that different species of animals have varying number of chromosomes, so it automatically nullifies, the reproduction stage