Brown-eyed right-hander marry blue-eyed right-hander. their first child is right-handed with blue eyes. what is the likelihood of a second child with the same symptoms.
To solve such a problem, you first need to draw up a crossing scheme. For A we will take right-handedness, and for left-handedness. B – brown eyes. b – blue eyes.
Crossing scheme in the photo.
We get the following offspring: AaBb, AaBb, aaBB, aaBb, AaBb, Aabb, aaBb, aaBb, aabb.
The genotype of the right-handed child with blue eyes is Aabb. As we can see from crossing, there are only 1/8 of such children. This means that the probability of re-birth of the same child is only 12.5%.
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