Double & Triple Morph Questions

I am normally very good with genetics, but this recent question, although simple has me stumped. The question is: If you were to breed a spinner to a normal, do you have a chance of producing spinners? Also, the same question for spinner blasts.
Thankyou

Jason

Yes, you do. The odds are stacked against you but you can infact get Spinners out of a Spinner + Normal, that also applies to Spinner Blasts, but again the odds are against you.

Yes :D

Yes, Cool! I thought it was possible but wasnt 100% sure. Thankyou yall!!!

Are the odds the same as a spider x pin, or is there a much lower chance spinner x normal because a gene crossover might be required?

I would think the spinner would have a spider gene from one parent and a pin gene from the other so the pin and spider genes would be on opposite sides of the DNA, and offspring would likely receive one gene or the other, but I don't understand what % of the time genes cross over. It might be very common so odds are the same as pin x spider, or odds could be radically different if genes rarely cross over.

Can any long-term breeder or geneticist here help me understand this better?

What you are dealing with is two genes that have different locations or loci on the chromosomes. Because of this, a spider cross pinstripe has exactly the same odds of producing spinners as spinner cross normal (which are both 1 in 4).

This is different than say, a super pastel (or super anything) or BEL for example. Those two genes share the same location so a super x normal is 100% pastel, for example. But a pastel x pastel is 25% normal, 50% pastel, and 25% super pastel.

Did that help?

JonV

Quote:

---

Originally Posted by JeffFlanagan

I would think the spinner would have a spider gene from one parent and a pin gene from the other so the pin and spider genes would be on opposite sides of the DNA

---

Think not of opposite sides of the DNA, but rather of different locations.

JonV

You don't see a lot of information on what people got breeding the combo animals. There are enough morphs that we might yet run into a combo of two linked genes but it might take a while to be recognized. I’ve not heard anything to indicate that spider and pinstripe are close neighbors on the same chromosome and there may well be no connection at all other than somewhat similar looks.

Spinner blast X Normal you end up with a 12.5% chance of each egg making one of the following. (Spinner Blast is Spider, Pin, and Pastel if memory serves me right.)

Normal, Spider, Pin, Pastel, Bumble bee, spinner, Pastel Pin, and Spinner Blast.

If a spinner blast was bred to a spider the odds get kinda funky.

6.25% chance of a Normal
18.75% chance of a Spider
6.25% chance of a pin
6.25% chance of a Pastel
18.75% chance of a Spinner
18.75% chance of a bumble Bee
6.25% chance of a Pastel Pin
18.75% chance of a Spinner Blast

Now if we go Spinner Blast to Spinner Blast Chrismas Occurs

Normal 1.5%
Spider 4.8%
Pin 4.8%
Pastel 3.1%
Super Pastel 1.5%
Spinner 14.1%
Bumble Bee 9.3%
Pastel Pin 9.3%
Spinner Blast 28.1%
Killer Bee 4.8%
Super Pastel Pin 4.8%
Super Spinner Blast 14.1%

(Above numbers rounded to first decimal place.)

I think it will be interesting when we get to the point that BPs are so combo'd the only way to figure out what's there is to breed them.

Like super pastel yellowbelly lesser pinstripe spider, for example.

JonV