Summary:
Recessive traits of a guppy are always represented by small letters e.g (a)
Dominant traits are always represented by capital letters e.g (A)
There is then the X/Y Genes. It is always the case where:
Females = XX
Males = XY
The X/Y Trait then becomes very complicated for me to understand. This is what I know for now:
X-Link Trait (e.g Traits: Pattern, Colour, Finnage):
Means that the traits of the particular strain can be passed down from either the female or the male guppy.
E.g: Female Snakeskin(ss) + Male Full Red(fr) [this is an example, don't bother about the caps]
If the fishes are X-Link, it means that their offspring can be:
Punnet Square:
(For info on Punnet Square click here.)
| | X(fr) | Y(fr) |
| X(ss) | | X(ss)Y(fr) |
| X(ss) | | X(ss)Y(fr) |
The results will be:
1. Female Snakeskin + Full Red
2. Male Snakeskin + Full Red
Both Male and Female Fries will show Full Red Snakeskin patterns!
Y-Link Trait:
Means that the genes of the particular strain can be only be passed down from the male guppy:
Using the above example again (the example is not real!)
Punnet Square:
E.g: Female Snakeskin(ss) + Male Full Red(fr) [this is an example, don't bother about the caps]
| | X | Y(fr) |
| X(ss) | | X(ss)Y(fr) |
| X(ss) | | X(ss)Y(fr) |
The results will be:
1. Female Snakeskin
2. Male Snakeskin + Full Red
Only the male fries will get Snakeskin + Full Red!
Interesting! This is like a math formular!
The problem now is that I am not sure if I am calculating this thing properly haha!
Next issue is:
How do I tell if the fish is X-Link or Y-Link =_=
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