Ahorse has 64 chromosomes and a donkey has 62, using your knowledge of meiosis explain why a cross between these animals produces a sterile mule

When horse and donkey produces offspring, the horse will give 32 chromosomes and donkey will give 31 chromosomes to the offspring. So the offspring has 63 in total. It is odd so it can not produce normal germ cell. So it is sterile.

Orbit is represented by the blank space