Answer:
10
Explanation:
(6−
6
3
)2−
(4)(3)
2
=(6−2)2−
(4)(3)
2
=42−
(4)(3)
2
=16−
(4)(3)
2
=16−
12
2
=16−6
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The genotype would be X'Y for the father (he would be colorblind)
The genotype would be X'X for the mother (she would be a carrier)
The offspring would be X'X' _ X'X_ X'Y_ XY
The ratio would be 1:1 normal to colorblind
Hope this was helpful(;