Quick Answer: What Is A Single Gene Trait?

What is an example of a monogenic trait?

Monogenic disorders (monogenic traits) are disorders caused by variation in a single gene and are typically recognized by their striking familial inheritance patterns.

Examples include sickle cell anemia, cystic fibrosis, Huntington disease, and Duchenne muscular dystrophy..

What does single gene trait mean?

Explanation: Assuming that you’re referring to single-gene traits, a single-gene trait is a trait that is controlled by only one gene. … The opposite of this is a polygenic trait, or a trait controlled by multiple genes.

What is a multi gene trait?

A polygenic trait is one whose phenotype is influenced by more than one gene. Traits that display a continuous distribution, such as height or skin color, are polygenic.

Is eye color a single gene trait?

Eye color was traditionally described as a single gene trait, with brown eyes being dominant over blue eyes. Today, scientists have discovered that at least eight genes influence the final color of eyes. The genes control the amount of melanin inside specialized cells of the iris.

Is nose shape a single gene trait?

The results of this study emphasizes that nose shape is genetically determined and follows the Mendelian single gene dominant-recessive pattern.

Can a single trait alter multiple genes?

A pleiotropic gene is a single gene that controls more than one trait. … The term pleiotropy is derived from the Greek words pleio, which means “many,” and tropic, which means “affecting.” Genes that affect multiple, apparently unrelated, phenotypes are thus called pleiotropic genes (Figure 1).

How many genes control a trait?

A trait is any gene-determined characteristic and is often determined by more than one gene. Some traits are caused by mutated genes that are inherited or that are the result of a new gene mutation.

What are examples of single gene traits?

Most traits are determined by more than one gene. For example, skin color and height are determined by many genes. Some phenotypes however, are determined by a single gene….Interlocking fingers. Interlock fingers. … Ear lobes. … Widow’s peak. … Tongue curling. … Hitch hiker’s thumb. … Pigmented iris. … PTC tasting.

Is height a single gene trait?

Another exception to Mendel’s rules is polygenic inheritance, which occurs when a trait is controlled by more than one gene. Height is a polygenic trait, controlled by at least three genes with six alleles. …

What is the most common single gene disorder?

Some of the more common single-gene disorders include cystic fibrosis, hemochromatosis, Tay-Sachs, and sickle cell anemia. Even though these diseases are primarily caused by a single gene, several different mutations can result in the same disease but with varying degrees of severity and phenotype.

What traits are inherited?

An inherited trait is one that is genetically determined. Inherited traits are passed from parent to offspring according to the rules of Mendelian genetics. Most traits are not strictly determined by genes, but rather are influenced by both genes and environment.

What are examples multiple allele traits?

The best characterized example of multiple alleles in humans is the ABO blood groups, discussed in the Non-Mendelian Inheritance concept. Other human traits determined by multiple alleles would be hair color, hair texture, eye color, built, physical structures, etc.