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Multiple Choice
How are genotype and phenotype related in an organism?
A
Genotype and phenotype are unrelated and function independently.
B
Genotype determines the phenotype by providing the genetic blueprint.
C
Phenotype determines the genotype by influencing genetic expression.
D
Phenotype is the genetic makeup, while genotype is the physical appearance.
Verified step by step guidance
1
Understand the definitions: Genotype refers to the genetic makeup of an organism, the specific alleles present in its DNA. Phenotype refers to the observable characteristics or traits of an organism, such as its morphology, development, biochemical properties, and behavior.
Recognize the relationship: The genotype provides the genetic instructions that determine the phenotype. This means that the genetic code within the DNA (genotype) is expressed as physical traits (phenotype).
Consider the role of alleles: Different alleles (variations of a gene) can lead to different phenotypes. For example, in pea plants, the allele for purple flowers (P) is dominant over the allele for white flowers (p). A plant with the genotype PP or Pp will have purple flowers, while a plant with the genotype pp will have white flowers.
Acknowledge environmental influence: While the genotype sets the potential for certain traits, the environment can influence the phenotype. For example, identical twins with the same genotype may have different phenotypes if they are exposed to different environmental conditions.
Summarize the correct relationship: The genotype determines the phenotype by providing the genetic blueprint. This means that the genetic information encoded in the DNA is responsible for the development and expression of traits in an organism.