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The Science of Heredity

Which statement is true about recessive traits?

A. Recessive traits can only be expressed when dominant alleles are present.
B. Recessive traits are expressed when both alleles are recessive.
C. Recessive traits are never expressed.
D. Recessive traits can be expressed with a combination of recessive and dominant alleles.



Answer :

GinnyAnswer

Final answer:

Recessive traits are expressed when an individual is homozygous for the recessive allele.


Explanation:

Recessive traits are expressed when both alleles are recessive. Mendel's law of dominance dictates that in a heterozygote, the recessive allele remains 'latent' but is expressed only when two copies of it are present. This means that recessive traits are only visible when an individual is homozygous for the recessive allele.


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