Difference Between Gene and Trait | Gene vs Trait
Relationship Between DNA Bases Genes, Proteins and Traits. By John Brennan What are the Small Parts of the DNA that Code for a Trait?. What is the difference between Gene and Trait - characteristics of individuals are called traits; molecular units of heredity of individuals are. The terminology can be somewhat confusing. Dysferlin is a protein, and "the dysferlin gene" means "the gene which contains the instructions for producing the .
Genes, Traits, and Proteins
For example, some amino acids attract water, and others are repelled by it. Some amino acids can form weak bonds to each other, but others cannot.
Proteins that catalyze accelerate chemical reactions, for example, have "pockets," which can bind specific chemicals and make it easier for a particular reaction to occur. Variations in the DNA code of a gene can change either the structure of a protein or when and where it is produced. If these variations change the protein structure, they could also change its function. For example, a single, specific mutation in hemoglobin -- the oxygen-carrying protein abundant in your red blood cells -- affects oxygen transport and is enough to cause sickle-cell anemia.
Traits Variations in a gene can affect traits in several ways.
Variations in proteins involved in growth and development, for example, can give rise to differences in physical features like height.
Pigments of skin and hair color are produced by enzymes, proteins that catalyze chemical reactions. Variations in both the structure and quantity of the proteins produced give rise to different amounts of skin and hair pigment and therefore different colors of hair and skin. However, these opinions are too extreme; in any case the effect of the vast majority of genes on the individual traits is so small that it can be neglected in practice.
what is the relationship between genes and traits? | Yahoo Answers
From the standpoint of evolution of the individual traits, it makes sense to consider only those genes whose effect, and thus the corresponding selection coefficient, is so great that the relevant selection predominates over the effect of genetic drift see Chap. In more complex cases, relatively complicated interactions occur amongst the genes at various loci.
In the presence of allele a1 at locus A, allele b1 at locus B can determine the formation of trait Z1 and allele b2 the formation of trait Z2; however, in the presence of allele a2, the situation can be quite the opposite, allele b1 can determine the formation of trait Z2 and allele b2 that of trait Z1. Of course, the genes of more than two loci participate in a great many interactions.
Table a depicts the result of crossing two homozygotes. Each of the homozygotes produces only a single type of gamete, so that all offspring in the F1-generation have the same heterozygote genotype from the standpoint of the given gene. Table b depicts the result of crossing two F1-heterozygotes.
Each heterozygote produces two types of gametes and their random combination leads to the formation of four types of zygote, i. Table c depicts the result of crossing two heterozygote individuals at two loci.
- Frozen Evolution. Or, that’s not the way it is, Mr. Darwin. A Farewell to Selfish Gene.
- What is the relationship between genes and traits?
Each heterozygote produces four types of gamete and their random combination leads to the formation of individuals in a ratio of 1: The existence of interactions greatly complicates both the search for the locus at which the gene determining a certain trait is located and also the delimitation of the particular gene.