Re: double recess. x double recess. but diff. morph
Using caramel hypos ("caramel glow" I think) X hypo pieds:
cchhPP = caramel hypo (normal for pied)
CChhpp = hypo pied (normal for caramel)
Since both parents are homozygous hypo neither has a normal copy of that gene to give so all the babies will be homozygous hypo. However, they will also be hets for both caramel and pied --> CchhPp
Now if you had 4 different genes in the two double homozygous recessive parents, like say snow X striped ghost you would end up with quadruple het babies:
aazzSSHH X AAZZsshh = aAzZsShH
Crossing two of those quadruple hets would in theory (if there is no linking of any of the 4 mutations) give you 1 in 256 stripped snow glow. But the upside is it would also only give you 1 in 256 completely normal that wasn't het for any of the four. The clutch variety from such a pair would be staggering.
Re: double recess. x double recess. but diff. morph
Quote:
Originally Posted by RandyRemington
Using caramel hypos ("caramel glow" I think) X hypo pieds:
cchhPP = caramel hypo (normal for pied)
CChhpp = hypo pied (normal for caramel)
Since both parents are homozygous hypo neither has a normal copy of that gene to give so all the babies will be homozygous hypo. However, they will also be hets for both caramel and pied --> CchhPp
Now if you had 4 different genes in the two double homozygous recessive parents, like say snow X striped ghost you would end up with quadruple het babies:
aazzSSHH X AAZZsshh = aAzZsShH
Crossing two of those quadruple hets would in theory (if there is no linking of any of the 4 mutations) give you 1 in 256 stripped snow glow. But the upside is it would also only give you 1 in 256 completely normal that wasn't het for any of the four. The clutch variety from such a pair would be staggering.
Great post....
For any pair of recessive traits.....the probabilty of obtaining a recessive from the breeding of two het parents is (1/(4^n) , where n is the number of recessives in question . by ^ I mean exponent!
So for 1 recessive trait it would be 1/4^1 or 1/4 (25% chance). for two it would be 1/(4^2) or 1/16 (6.25% chance).
1/256 chance is really small but it would be awesome to obtain a quad reccessive.
