Someone check my logic?

[zojojojo]

what it comes down to is this:

(X - magic gene; x - non-magic gene; Y - duh)

XX + XY = XX, XY, XX, XY

Xx + XY = XX, Xx, XY, xY

XX + xY = Xx, Xx, XY, XY

xx + XY = Xx, Xx, xY, xY

xx + xY = xx, xx, xY, xY

n(XX) = 3/20 = .15

n(Xx) = 5/20 = .25

n(xx) = 2/20 = .10

n(XY) = 5/20 = .25

n(xY) = 5/20 = .25

now you get to figure out if you want your magic to be dominant or recessive or some kind of co-dominant thing (the chances of male magic users don't change... it's the odds for the girls that change)
-Z, Post-reader at Medium
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If architects built buildings the way programmers write programs, the first woodpecker to come along would destroy civilization.