Question

Tiglions (from male tiger and female lion) are fertile or infertile or sterile or just cannot survive?
Are all hybrids like tiglions when it come to fertility?

Answer 1

Let me put it this way: I know of no hybrid which is fertile. Which is certainly not to say that examples of fertile hybrids might not be out there. Tentatively, yes - all hybrids are infertile.

Answer 2

and what about sterility?

Answer 3

Infertile and sterile mean the same thing - they cannot produce offspring...

Answer 4

what if its an mcq question and all the above are options?

Answer 5

"Infertility (IN-fur-TILL-ih-tee) is reduced or lost ability to conceive and carry a baby, either for a short time or forever. Sterility (stuh-RILL-ih-tee) means you can never conceive and carry a child. Infertility and sterility do not change your ability or desire to have sex."
~ http://www.hci.utah.edu/patientdocs/hci/drug_side_effects/infertility_and_sterility.html

I think sterility, if you had to pick, would be more appropriate in this case? Seems like semantics, but meh.

Answer 6

Oh and also - I stumbled upon an excellent article about why the tree of life is outdated due to the prevalence of horizontal gene transfer. Well worth the read.

Why I bring it up is because I remembered it mentioned something about hybrids..

"Some researchers are also convinced that hybridisation has been a major driving
force in animal evolution (see "Natural born chimeras", and "Two into one"), and that
the process is ongoing. "It is really common," says James Mallet, an evolutionary
biologist at University College London. "Ten per cent of all animals regularly
hybridise with other species." This is especially true in rapidly evolving lineages
with lots of recently diverged species - including our own. There is evidence that
early modern humans hybridised with our extinct relatives, such as Homo erectus and
the Neanderthals (Philosophical Transactions of the Royal Society B , vol 363, p
2813)."

This should, of course, be taken with a grain of salt - but I encourage you to look into it more.

http://www.idnet.com.au/files/pdf/Axing-Darwins-tree-New-Scientist-2009.pdf