Biology for IGCSE & O level - Inheritance (Section 9 - No. 41)
What is the role of the dominant allele?
It only expresses its trait when paired with another dominant allele.
It masks the expression of the recessive allele.
It is only expressed in the heterozygous condition.
It prevents the expression of other genes.
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The dominant allele expresses its trait even if a recessive allele is present.