Can multiple genes control one trait?
Polygenic inheritance occurs when one characteristic is controlled by two or more genes. Often the genes are large in quantity but small in effect. Examples of human polygenic inheritance are height, skin color, eye color and weight. Polygenes exist in other organisms, as well.
How many genes can influence a single trait?
There are several patterns that account for the inheritance of traits. These include Mendelian or monogenetic, where one gene causes one trait; pleiotropic, where one gene is responsible for multiple traits; and polygenic or multifactorial, where two or more genes are required to produce one trait.
Which of the following traits is controlled by multiple genes?
polygenic trait
A polygenic trait is a characteristic, sometimes we call them phenotypes, that are affected by many, many different genes. A classic example of this would be height. Height in humans is very strongly genetically controlled, but there are many, many different genes that control height.
What is controlled by a single gene?
Some characteristics are controlled by a single gene , such as fur colour in mice and red-green colour blindness in humans. Genes might have different forms, and these are called alleles . Chromosomes are found in the nucleus of a body cell in pairs.
What trait is controlled by a single gene?
Widow’s peak and hitchhiker’s thumb are dominant traits controlled by a single autosomal gene.
Which of the following best defines a single trait controlled by multiple genes?
A trait that is controlled by more than one gene is called polygenic which translates to “multiple genes”. The genes work together to make one trait. Examples are skin, eye and hair color.
Which trait is controlled by one gene?
Some scientists have reported that handedness is due to a single gene with right handedness dominant and left handedness recessive. However, other scientists have reported that the interaction of two genes is responsible for this trait.
What traits are controlled by multiple genes?