السؤال 31

Which statements about a recessive allele are true? Select all that apply.

Recessive means the allele is a weakened form of the gene
An allele can be recessive and still be the most common allele in the populationالإجابة الصحيحة
Recessive means the allele is always harmful
Whether an allele is recessive says nothing about whether it is harmfulالإجابة الصحيحة

الشرح

The label is about expression: it records which of two different alleles is seen in the organism, and says nothing about quality or about how many organisms carry the allele. Recessive alleles range from completely harmless to significant in their effects, and one of them may be held by most of a population, so calling an allele weak or harmful simply because it is recessive reads a judgement into a word that carries none.

الشرح

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