A human baby boy inherits a recessive allele from his mother. In which circumstance would he most likely show the trait coded for by the recessive allele? Group of answer choicesThe allele is on the X chromosome.The baby inherits the dominant allele from his father.The allele is on an autosomal chromosome and the baby is a twin.The allele is on the Y chromosome.
Question
A human baby boy inherits a recessive allele from his mother. In which circumstance would he most likely show the trait coded for by the recessive allele? Group of answer choicesThe allele is on the X chromosome.The baby inherits the dominant allele from his father.The allele is on an autosomal chromosome and the baby is a twin.The allele is on the Y chromosome.
Solution
The baby boy would most likely show the trait coded for by the recessive allele if the allele is on the X chromosome. This is because males have one X and one Y chromosome. If a boy inherits a recessive allele on the X chromosome from his mother, he doesn't have a second X chromosome (like females do) to potentially carry the dominant allele and mask the recessive one. Therefore, the trait coded by the recessive allele would be expressed.
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