Traits that are recessive are written in lower case. Therefore, “E” will represent brown eyes. Varieties, or alleles, of that trait that are dominant will be designated by capital letters. For example, the trait for eye color could be represented with the letter “E”. Examples of Genotype Eye ColorĪlthough a particular genotype consists of many nucleic acids, scientists typically represent genotypes with single letters, or two letters in the case of sexually reproducing organisms that receive one allele from each parent. These combinations of genotype give rise to the enormous variety of life on Earth. Mutations can occur in these alleles, new combinations can arise during meiosis, and infinite amount of variety can be created. In sexually reproducing organisms, there are two alleles present in each organism, which can have complex interactions with each other, and other genes. Sometime, an allele will mutate in a beneficial way, the organism will reproduce more and the genotype will increase in the population. In bacteria, the DNA exists in a ring and only one allele for each genotype is present. The different alleles are produced by mutations to the DNA, and may give rise to beneficial or detrimental changes. Modern DNA analyzing techniques have made it easier to identify which segments of DNA are responsible for various phenotypes.Ī genotype has different alleles, or forms. The outward appearance, or phenotype, is the result of interactions of proteins being created by the DNA. A genotype consists of all the nucleic acids present in a DNA molecule that code for a particular trait. The genotype of an organism is the chemical composition of its DNA, which gives rise to the phenotype, or observable traits of an organism.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |