Michigan Test for Teacher Certification (MTTC) Secondary Integrated Science Practice test

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Prepare for the Michigan Test for Teacher Certification (MTTC) Secondary Integrated Science exam. Utilize flashcards and multiple-choice questions with hints and explanations to succeed in your certification.

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Which term refers to the stronger of two genetic traits?

Homozygous
Recessive
Dominant
Heterozygous

The correct answer is: Dominant

The term that refers to the stronger of two genetic traits is dominant. In genetics, the dominant trait is the one that is expressed or seen in the organism when present, even if only one copy of the dominant allele is inherited from a parent. It masks the effect of the other allele, which is considered recessive, when the two are present together in a heterozygous individual. In contrast, recessive traits only manifest when two copies of the recessive allele are present, meaning the dominant trait will prevail in a heterozygous scenario. Homozygous refers to having two identical alleles for a particular gene, while heterozygous refers to having two different alleles for that gene. Recognition of the dominant trait is a fundamental concept in genetics, particularly in Mendelian inheritance patterns, where understanding which traits are dominant helps predict offspring traits.