Answer: The genotype is the set of genes in our DNA which is responsible for a particular trait. The phenotype is the physical expression, or characteristics, of that trait. For example, two organisms that have even the minutest difference in their genes are said to have different genotypes.
A genotype refers to the genetic characteristics of an organism. A phenotype refers to the physical characteristics. For example, having blue eyes (an autosomal recessive trait) is a phenotype; lacking the gene for brown eyes is a genotype. Dysferlin deficiency will only cause muscle weakness (phenotype) if a person has two defective copies of the dysferlin gene (genotype). The genotype of two defective dysferlin genes is associated with two different phenotypes, the symptoms of LGMD2B or of Miyoshi Myopathy.
