Original Het Chart
This chart was used by the glider community for years, but is now being updated to reflect more consistent calculations:
http://www.petsugargliders.com/recchart.php
http://glidernursery.webs.com/percenthetchart.htm
Many of the values work out to be from the result of this calculation:
(Higher % het parent / 2) + (Lower % het parent / 4 )
(We are not sure why that formula was used, but we do not believe it to be the most accurate way to calculate the probability)
For example, the values for the 50%/50%, 50%/25% and a 50%/12.5% crosses result in the same value as this Het Chart (Actually Probability of Hets).
The values for this 100%/50% and 100%/25% crosses result in the same value as this Het Chart (Actual Probability of Hets & Color).
The values for the 66%/50% and the 66%/16.5% crosses result in the same value as this Het Chart (Actual Probability of Carrier out of Standard Grey Offspring).
http://www.petsugargliders.com/recchart.php
http://glidernursery.webs.com/percenthetchart.htm
Many of the values work out to be from the result of this calculation:
(Higher % het parent / 2) + (Lower % het parent / 4 )
(We are not sure why that formula was used, but we do not believe it to be the most accurate way to calculate the probability)
For example, the values for the 50%/50%, 50%/25% and a 50%/12.5% crosses result in the same value as this Het Chart (Actually Probability of Hets).
The values for this 100%/50% and 100%/25% crosses result in the same value as this Het Chart (Actual Probability of Hets & Color).
The values for the 66%/50% and the 66%/16.5% crosses result in the same value as this Het Chart (Actual Probability of Carrier out of Standard Grey Offspring).
Summary of Changes:
Except for the 100%/66% cross, the changes are favorable...In other words, they have been listed as lower chances than they could be advertised.
~ 100%/66% crosses should be listed as 50% hets(not 66%)
~ 66%/66% crosses should be listed as 50% hets(not 33%)
~ 33%/33% and 33%/25% crosses should be listed as 25%% hets(not 16.5%)
~ 25%/12.5% crosses should be listed as 16.67% hets(not 12.5%)
~ 16.67%/12.5% crosses should be listed as 12.5% hets
~ 100%/66% crosses should be listed as 50% hets(not 66%)
~ 66%/66% crosses should be listed as 50% hets(not 33%)
~ 33%/33% and 33%/25% crosses should be listed as 25%% hets(not 16.5%)
~ 25%/12.5% crosses should be listed as 16.67% hets(not 12.5%)
~ 16.67%/12.5% crosses should be listed as 12.5% hets
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