What are examples of polygenic traits?
Some examples of polygenic inheritance are: human skin and eye color; height, weight and inteligence in people; and kernel color of wheat.
What is polygenic traits give 2 examples?
Inheritance. 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.
Which definition best describes polygenic traits?
The best definition which describes polygenic traits is : B) traits that are controlled by multiple genes. Polygenic traits basically mean the traits that are a result of multiple intertwined traits like for example skin colour.
What is a polygenic trait List 3 examples?
Some examples of polygenic traits are height, skin color, eye color, and hair color.
What causes variations in traits like hair color eye color and height?
Human features like height, eye color, and hair color come in lots of slightly different forms because they are controlled by many genes, each of which contributes some amount to the overall phenotype.
How do you know if a trait is polygenic?
Usually, traits are polygenic when there is wide variation in the trait. For example, humans can be many different sizes. 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.
Why is polygenic inheritance important?
The statistical analysis of polygenic inheritance patterns can help to provide an estimate of population parameters. Most of the polygenic inheritance follow the normal distribution curve, wherein the majority of the people fall in the middle range of the curve. Polygenic inheritance is different from multiple alleles.
What does it mean if a trait is polygenic list three traits that are polygenic in humans?
Polygenic trait refers to a trait that is controlled by multiple non-allelic genes. In humans, height, skin color, hair color, and eye color are examples of polygenic traits. …
How can you tell if a trait is polygenic?
What is different between a multiple trait and a polygenic?
The key difference between multifactorial and polygenic traits is that multifactorial traits are traits that are controlled by many genes and environmental factors, while polygenic traits are traits that are controlled by more than one gene.
What does a polygenic trait have?
Polygenic traits have a bell-shaped distribution in a population with most individuals inheriting various combinations of alleles and falling within the middle range of the curve for a particular trait. Examples of polygenic traits include skin color, eye color, hair color, body shape, height, and weight.
How many genes influence a polygenetic trait?
Polygenic traits are controlled by an unknown number of genes. The gene expression is influenced by a variety of factors including gender, nutrition, breed, rate of growth, and amount of exercise. These traits are quantitative traits – that is, there is a wide range within the population.
What are monogenic traits in biology?
Monogenic Trait. A monogenic trait is a characteristic that is produced by a single gene or a single allele. A gene is a DNA segment that is responsible for physical traits and the phenotype of an organism. An allele is one of a pair of genes on a chromosome – the pair controls the same trait.