Question: What Are Single Gene Traits?

Does hair color come from Mom or Dad?

Each trait consists of two alleles, one from your Mother and one from your Father, they may be the same or they may be different.

The most common gene which controls the color of our hair is a brown/blonde gene, which consists of a dominant brown allele and a recessive blonde allele..

What is the difference between single gene traits and complex traits?

A key difference between single gene traits such as those Mendel studied and complex traits such as human height is that: single gene traits are generally not significantly influenced by the environment, whereas complex traits have a significant environmental component.

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.

Is hair color a single gene trait?

Red hair color is not an example of a simple genetic trait. While the amount of red pigment may be mainly determined by one gene (MC1R), there are a large number of different MC1R alleles, and other genes affecting the amount of brown pigment that plays a major role in determining hair color.

What is the rarest hair color?

red hairNatural red hair is the rarest hair color in the world, only occurring in 1 to 2% of the global population. Since red hair is a recessive genetic trait, it is necessary for both parents to carry the gene, whether or not they themselves are redheaded.

Is hair color a Mendelian trait?

Mendelian traits, such as the presences of freckles, are traits passed down on one gene with dominant and recessive alleles. … Non-Mendelian traits, such as hair color, don’t follow the simple pattern of dominant and recessive alleles from one gene.

What is an example of a single gene trait?

Assuming that you’re referring to single-gene traits, a single-gene trait is a trait that is controlled by only one gene. … An example is blood type – there is an IA allele, a IB allele, and an i allele, but your blood type (or this system, at least) is still controlled by one gene.

What is a single gene?

When a certain gene is known to cause a disease, we refer to it as a single gene disorder or a Mendelian disorder. For example, you may have heard of cystic fibrosis, sickle cell disease, Fragile X syndrome, muscular dystrophy, or Huntington disease.

Is height a single gene trait?

Height is a polygenic trait, controlled by at least three genes with six alleles. If you are dominant for all of the alleles for height, then you will be very tall. … Skin color is also a polygenic trait, as are hair and eye color.