BI-1544
Genetic crosses and ratios
Biology · Secondary 4 · Medium · Genetic crosses and ratios
In humans, allele B for brown eyes is dominant over allele b for blue eyes. A heterozygous brown-eyed man (Bb) marries a blue-eyed woman (bb). What is the expected ratio of brown-eyed to blue-eyed children?
- 3 brown-eyed : 1 blue-eyed
- 1 brown-eyed : 1 blue-eyed
- 1 brown-eyed : 3 blue-eyed
- All brown-eyed
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