AP BIOLOGY

Detailed explanation-1: -Dominant-An allele whose trait always shows up in the organism when it is present.

Detailed explanation-2: -A dominant trait will always be expressed in the offspring if the dominant allele is present, even if there is only one copy of it (heterozygous or dominant homozygous, Aa or AA).

Detailed explanation-3: -Recessive alleles are only expressed when no dominant allele is present.

Detailed explanation-4: -Both copies of the gene can contribute to an individual’s phenotype. Dominant alleles will produce the phenotype associated with them, even in the presence of another allele.

Detailed explanation-5: -For some genes and traits, certain alleles are dominant while others are recessive. A dominant trait is one that shows up in an individual, even if the individual has only one allele">allele that produces the trait. Some aspects of eye color work this way. Brown eyes, for instance, are dominant over blue eyes.