Genotype refers to the genetic makeup of an individual. It's the specific set of genes they inherit from their parents, represented by the combination of alleles (different versions of a gene) they possess. Think of it as the instruction manual for building an organism.
Phenotype, on the other hand, describes the observable characteristics of an individual, such as their appearance, behavior, and biochemical makeup. It's the actual expression of the genes, shaped by both the genotype and the environment. Think of it as the finished product built based on the instructions.
Here are some terms that describe genotype and phenotype:
Genotype:
* Homozygous: An individual with two identical alleles for a specific gene.
* Heterozygous: An individual with two different alleles for a specific gene.
* Dominant: An allele that masks the effect of the other allele in a heterozygous individual.
* Recessive: An allele whose effect is masked by the dominant allele in a heterozygous individual.
* Wild type: The most common allele or genotype in a population.
* Mutant: A rare allele or genotype that differs from the wild type.
Phenotype:
* Discrete: A phenotype that falls into distinct categories, such as flower color (red or white).
* Continuous: A phenotype that can vary along a spectrum, such as height or skin color.
* Qualitative: A phenotype that can be described using words, such as flower color or eye color.
* Quantitative: A phenotype that can be measured numerically, such as height or weight.
Example:
Let's consider eye color.
* Genotype: A person might have a genotype of "BB" (homozygous dominant for brown eyes), "Bb" (heterozygous for brown eyes), or "bb" (homozygous recessive for blue eyes).
* Phenotype: The corresponding phenotypes would be brown eyes for the first two genotypes and blue eyes for the last genotype.
Key takeaway: Genotype determines the potential, but phenotype is the actual expression, influenced by both the genotype and environmental factors.
