Sex of ball pythons from certain males?

[GoldSheep]

So when I was sold my two male ball pythons, the previous owner said that all of the offspring from both seemed to always turn out male.

I've only bred them once, but both results were all male.

Is this really possible to *only* get one sex from one male snake? I find it hard to belief... and I'll see if I can hit their first female with the current clutch, but the odds seem a little odd.

Are my male snakes mysogynists???

[h00blah]

Look into the banana issues. To be honest, I'm not even 100% sure what EXACTLY is the issue. Apparently there was a lot of drama that went on when people were figuring out the issue. Lots of money at stake.

[GoldSheep]

Eh~?

But this a normal and a pastel, so they shouldn't have issues with producing females...

[Mike41793]

Look into the banana issues. To be honest, I'm not even 100% sure what EXACTLY is the issue. Apparently there was a lot of drama that went on when people were figuring out the issue. Lots of money at stake.

I learned this from experience: googling banana sex ratio is not the best idea...

[h00blah]

Eh~?

But this a normal and a pastel, so they shouldn't have issues with producing females...

Not all animal is the same. Some have more genetic "issues" or differences than what you can see. Either your normal or pastel probably aren't wired to throw both sexes. It's a possibility. Is that the answer? Who knows? That would take some expensive genetic testing to get that result lol. You could just have bad luck!

Point is, you asked if it was possible, and yes, it is possible .

[Annarose15]

I learned this from experience: googling banana sex ratio is not the best idea...

Ummm...maybe try the search function when you are already in a reptile forum!

[Domepiece]

I would imagine this is entirely plausible. Males are the determining factor regarding the sex of their offspring since females only have one gene (X) to contribute and males have two (X & Y). Also there are many family lines which produce an abnormally high amount of females or males. So I guess it is possible. There is much much more to this such as genetic abnormalities of males that have XXY and XYY that could tip the scales towards more female and more male sperm and many other factors to consider as well but lets not get into all that. Dont know it works like this with snakes but it does occur in other species such as humans.

[aalomon]

I would imagine this is entirely plausible. Males are the determining factor regarding the sex of their offspring since females only have one gene (X) to contribute and males have two (X & Y). Also there are many family lines which produce an abnormally high amount of females or males. So I guess it is possible. There is much much more to this such as genetic abnormalities of males that have XXY and XYY that could tip the scales towards more female and more male sperm and many other factors to consider as well but lets not get into all that. Dont know it works like this with snakes but it does occur in other species such as humans.

Correct for humans, not for snakes. Ball pythons (someone please correct me if Im wrong) are ZZ (male) and ZW (female), unlike us it is the female that determines the sex ratio. So to the op, you just didnt hit the odds, it has nothing to do with the male.

[NWReptiles]

Correct for humans, not for snakes. Ball pythons (someone please correct me if Im wrong) are ZZ (male) and ZW (female), unlike us it is the female that determines the sex ratio. So to the op, you just didnt hit the odds, it has nothing to do with the male.

Then how is it, with the Banana and Coral Glow ball pythons, a male can be considered a Male Thrower, or a Female Thrower??? THis is where the male thrower throws 95% males, and the female throwers throw 95% females. This is decided upon by the MALE which appears to throw your info right out the window (with all due respect)

[aalomon]

Then how is it, with the Banana and Coral Glow ball pythons, a male can be considered a Male Thrower, or a Female Thrower??? THis is where the male thrower throws 95% males, and the female throwers throw 95% females. This is decided upon by the MALE which appears to throw your info right out the window (with all due respect)

Coral Glow / Banana genetics are confusing to say the least, but that does not change the fact that ball pythons use a ZZ/ZW system (in this system the ZZ are always male and the ZW are always female with the occasion parthenogenetic result of WW females ). This is knowledge is common throughout scientific literature.

An example - http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1838728/

Evidence for different origin of sex chromosomes in snakes, birds, and mammals and step-wise differentiation of snake sex chromosomes- November 28, 2006

"All snake species are subject to genetic sex determination with sex chromosomes, as are mammals and birds, and they have female heterogamety (ZZ males and ZW females)."