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The Cultivars (morphs)/Genetics Issues Discussions about genetics issues and/or the various cultivars for cornsnakes commercially available.

PILE-O LAVAS & LAVA CINDERS !!
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Old 06-18-2014, 01:03 PM   #81
5 Star Serpents
I purchased 2 Homo Cinder females from Carol a few years back, both bred this season, 1 clutch was a crap shoot with bad fertility and all the good eggs ended up dying. The other clutch is fine, I haven't sexed them all yet but of the ones I have it was a 3.2 so far. I will sex the rest tonight and post it.

It was Cinder X Cinder pairing.
 
Old 06-18-2014, 01:12 PM   #82
DuxorW
Yes, we'd expect an equal sex ratio in a cinder x cinder pairing because the cinder allele isn't affecting the sex ratio of the clutch as a whole. I predict that if you breed a het cinder male to one of those cinder females from Carol, you will get both male and female cinders.
 
Old 06-18-2014, 02:03 PM   #83
Nanci


So is this correct?

WT= Wild Type

I didn't think I was going to post this when I was writing it out, or it would have been neater...
 
Old 06-18-2014, 02:12 PM   #84
DuxorW
Yes Nanci. I was about to upload a similar chart but your handwriting is better than mine
 
Old 06-18-2014, 02:16 PM   #85
Nanci
So I am quite happy that a female peppermint is the foundation dam for my peppermint tessera project! Bred back to her son, I should get a 50:50 M/F mix.

My other two cinder projects- my targets will all be male. Unless there is crossover.
 
Old 06-18-2014, 02:24 PM   #86
DuxorW
Yes. Given enough data, we could eventually calculate the probability of a crossover, although based on the results from Carol and Walter, the frequency is very low. I guess the moral of the story is that it seems prudent to start cinder projects with a female that is homozygous cinder.
 
Old 06-18-2014, 02:29 PM   #87
Nanci
So- since it appears that cinder is apparently sex-linked, I wonder if any other genes are?
 
Old 06-18-2014, 02:40 PM   #88
DuxorW
I think the corn has 36 chromosomes and the Z and W are small, so the odds aren't high by any means, but it's something to keep in mind especially as new single gene mutants are discovered. Cinder is a newer mutation so I'm not surprised this is just coming to light. Imagine the headache involved with combos of sex-linked genes!
 
Old 06-18-2014, 03:47 PM   #89
cguarino30
Quote:
Originally Posted by Nanci View Post
So I am quite happy that a female peppermint is the foundation dam for my peppermint tessera project! Bred back to her son, I should get a 50:50 M/F mix.

My other two cinder projects- my targets will all be male. Unless there is crossover.
Good news for anyone hoping for a peppermint stripe male from squirrel and chipmunk, though.
 
Old 06-18-2014, 04:11 PM   #90
Walter Smith
Quote:
Originally Posted by kc261 View Post
The good news, I guess, is that so far all of the data we have seems to follow Duxor's hypothesis. As long as that continues to hold up, it might be a pain to work with, but at least we'll know what we are working with. Much better than just thinking you are getting really bad odds over and over and over.
I agree and......

.....This is what I thought the first year, but then the following not so much and then this year, GOTTA be something going on !!

Walter
BOUT' CORNS !!
 

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