In humans, right-handedness dominates over left-handedness, brown-eyed over blue-eyed. The blue-eyed left-hander married

In humans, right-handedness dominates over left-handedness, brown-eyed over blue-eyed. The blue-eyed left-hander married a heterozygous brown-eyed left-hander. What is the likelihood of a brown-eyed child appearing in their family?

A-dominant right-handed
a – recessive left-handed
A- Dominant brown-eyed
a-recessive blue-eyed
P Aa x aa Aa (brown-eyed left-hander) aa (blue-eyed left-hander)
G A a x a a
F Aa (brown-eyed) aa (blue-eyed) Aa (brown-eyed) aa (blue-eyed)
answer: 50% – the likelihood of a brown-eyed child



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