Question

what is true about dominant traits?

• dominant traits are unable to be passed on to offspring.
• dominant traits take longer to be expressed than recessive traits.
• dominant traits will replace recessive traits in an organism over time.
• dominant traits will be expressed if one dominant allele is present.

Explanation:

To determine the correct statement about dominant traits, we analyze each option:

• Option 1: Dominant traits are heritable and can be passed to offspring, so this is false.
• Option 2: The expression of a trait (dominant or recessive) is not related to time taken, so this is false.
• Option 3: Dominant traits don't necessarily replace recessive traits over time; it depends on natural selection and inheritance patterns, so this is false.
• Option 4: By the definition of dominant traits in genetics, a dominant trait is expressed in the phenotype if at least one dominant allele is present (either homozygous dominant or heterozygous). This matches the genetic principle.

Answer:

D. Dominant traits will be expressed if one dominant allele is present.