Nondisjunction in Chameleons

[silas.edwin.johnson]

Does nondisjunction occur in Chameleons? If you aren't aware, nondisjunction refers to an error made during the meiosis process, where chromosomes aren't separated properly resulting in weird sex chromosome combinations. In humans that would be like Klinefelter syndrome, or a sex chromosome arrangement of XXY. Chameleons have different sex chromosomes obviously, but meiosis should still occasionally make errors, resulting in nondisjunction. Are there any reports of chameleons having disorders caused by nondisjunction?

 

[GrannyK]

@kinyonga have you ever heard this?

 

[kinyonga]

Sorry…at the moment I can’t be sure. I’m no expert on genetics sadly. It’s never been my strong point.

 

[kinyonga]

Can I ask why you’re asking this question please?

 

[kinyonga]

I don’t know if this will be of any interest to you or not…
https://pmc.ncbi.nlm.nih.gov/articles/PMC5748700/

 

[kinyonga]

Are you looking for parthogenesis in chameleons?

 

[Chromatic Chameleons]

While we have never conducted the necessary genetic tests to determine the root cause of the issue, but we have on a handful of occasions had "females" that get larger than our typical females. They tend to be bright orange/peach, and they never end up laying eggs. I have a suspicion this is some type of chromosome issue going on in those cases.

 

[kinyonga]

While we have never conducted the necessary genetic tests to determine the root cause of the issue, but we have on a handful of occasions had "females" that get larger than our typical females. They tend to be bright orange/peach, and they never end up laying eggs. I have a suspicion this is some type of chromosome issue going on in those cases.

This would be interesting to follow up on!

 

[silas.edwin.johnson]

Can I ask why you’re asking this question please?

I'm doing an autecological study on F. pardalis, particularly the more cellular aspects. I was wondering if anybody had ever heard of nondisjunction. The conclusion I came to was that it is POSSIBLE, as evidence of nondisjunction exists in Sceloporus grammicus, which diverged from chameleons 140 MYA, so chameleons probably also experience nondisjunction.

 

[kinyonga]

Thanks for your reply. If you figure anymore out about it all I hope you’ll post on here. If I find anything,I’ll do the same. It’s something very interesting that I’d love to learn more about.