Marco's parents both have brown eyes,but Marco's eyes are blue.Marco's eyes are the result of

Question

Quizplus · Accepted Answer

Marco's blue eyes are a result of recessive inheritance. Both of his parents may have carried the recessive allele for blue eyes without expressing it themselves, and it only expressed in Marco when he received two copies of the recessive allele. Dominant inheritance refers to an allele that masks the presence of another allele, genetic mutation refers to a change in the DNA sequence that may lead to altered traits, and chromosomal abnormality refers to a structural or numerical abnormality in the chromosomes. None of these explanations fit the scenario given in the question.

Marco's Parents Both Have Brown Eyes,but Marco's Eyes Are Blue