Friday, 15 July 2011

Why is The F5 Generation Male the First Fertile Generation?

savannah kittens for sale - A better question is why are hybrids in general sterile? Sterilization in hybrids is common. A mule is the result of mating a horse to a donkey. Mules are sterile. Researchers at Cornell University have made the first discovery of a gene pair that provokes problems at hybridization. Two genes from two fruit fly species interfere with each other preventing the production of male offspring. The Dobzhansky-Muller model theory was formed in the 1930s that suggests hybrid incompatibilities that cause thing such as death or sterility are caused by genes that have evolved from a common ancestor but diverged in each of the species.





The best explanation for sterility in animals so far with limited studies is the unequal crossing over during meiosis that causes deletions and duplications of genetic material. If this always happens because the chromosomes do not align then the animal is sterile. If a critical gene is deleted or duplicated the animal may not survive to term or even to adulthood. F1, F2, F3 and F4 generation savannah cat males cannot reproduce. The F5 generation savannah stud is only 3.12% Serval cat blood. It’s the dilution of the Wild African Serval cat genes that make reproduction in lower generation males possible.