Making sense of genetic notation?

[Pitchfire]

I think I have the genetic speak down for the most part, but still have a hard time figuring out what is being expressed in places. Looking on Scott Felzer's site there is always a number before the listing? Does anybody know what the number is for? Also a listing I am interested in lists the parents as:

Female - Het Blue red sided

Male - Het Blue red sided

So the parents carry both alleles (the blue red sided allele and the normal allele) but express the common type? So the offspring are?

[Stefan-A]

The number denotes the gender of the snakes, always in the order males.females.unknown.

For example, 1.2.3 would in other words mean 1 male, 2 females and 3 unknown. Two females would be given as 0.2, one male as 1.0 and three unknown as 0.0.3.

[Steveo]

I think I have the genetic speak down for the most part, but still have a hard time figuring out what is being expressed in places. Looking on Scott Felzer's site there is always a number before the listing? Does anybody know what the number is for? Also a listing I am interested in lists the parents as:

Female - Het Blue red sided

Male - Het Blue red sided

So the parents carry both alleles (the blue red sided allele and the normal allele) but express the common type? So the offspring are?

If both parents are heterozygous, approximately 25% of the offspring will have the double recessive and display the blue coloration. 50% will be het and the other 25% will be homozygous for the dominant (normal) allele. In this case it would be impossible to tell which are het and which are homo for the normal alleles; the only sure way to know you produced a het (without breeding it) is to cross a homo or het for normal with a homo for recessive - then all the normal phenotypes are sure to be hets.

Edit: if what you list are the parents of what you want to buy, they will produce some blue red sideds and the rest will be normals sold as "66% hets," which means each normal phenotype has a 66% chance of being het for a blue phase allele.

[Pitchfire]

Thank you so much. That is extremely helpful!

[Steveo]

I looked at Scott Felzer's website and my impression is that the blue red-sideds don't follow traditional Mendelian genetics, so most of what I said above does not apply. I'd call or email Scott and ask about them - he's pretty personable and can be found posting on this forum from time to time.

[Pitchfire]

I have a few emails in to him but he must be busy right now.

[d_virginiana]

This was the recent thread talking about taxonomy

http://www.thamnophis.com/forum/gene...wondering.html