What are 3 examples of polygenic traits?

What are 3 examples of polygenic traits?

In humans, height, skin color, hair color, and eye color are examples of polygenic traits.

What is a polygenic trait graph?

If you were to graph out a trait or phenotype that is polygenic, you would notice a trend. These traits have what’s called continuous variation, showing a bell curve of values for the phenotype. This is because there are multiple genes that play a role in the phenotype, and each gene could have multiple alleles.

What type of curve represents a graph of polygenic traits?

Natural selection can act on traits determined by different alleles of a single gene, or on polygenic traits (traits determined by many genes). Polygenic traits in a population often form a bell curve distribution.

What are the types of polygenic inheritance?

Polygenic inheritance is controlled by two types of alleles or genes, namely:

• Contributing alleles: Alleles that contribute to continuous variation are referred to as contributing alleles.
• Non-contributing alleles: Alleles that do not contribute to continuous variation are referred to as non-contributing alleles.

Which one is example of monogenic quantitative?

A quantitative inheritance or monogenic inheritance deals with the inheritances of qualitative characters which have two contrasting expressions e.g. tall and dwarf pea plants. Each character is controlled by a single pair of contrasting alleles. There is no intermediate type.

What are two types of alleles?

Different versions of a gene are called alleles. Alleles are described as either dominant or recessive depending on their associated traits.

Why are polygenic traits represented by a bell curve?

why are certain polygenic traits represented by a bell curve? A polygenic trait is controlled by two or more genes, and each gene often has two or more alleles. As a result, there can be many possible phenotypes, represented by a bell curve.

Which best describes epistasis?

Epistasis occurs when one gene affects the outcome, or phenotype, of another gene.

Which is the best description of polygenic inheritance?

Polygenic inheritance is a type of incomplete dominance inheritance, where the expressed phenotypes are a mixture of inherited traits. 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.

What does the middle range of polygenic traits mean?

Polygenic Traits Distribution. These individuals fall in the middle range of the curve, which represents the average range for a particular trait. Individuals at the ends of the curve represent those who either inherit all dominant alleles (on one end) or those who inherit all recessive alleles (on the opposite end).

How are polygenic traits related to environmental factors?

Environmental factors can also influence polygenic traits. Polygenic traits tend to have a bell-shaped distribution in a population. Most individuals inherit various combinations of dominant and recessive alleles. These individuals fall in the middle range of the curve, which represents the average range for a particular trait.

How are dark and light alleles related in polygenic inheritance?

Those who inherit an even number of dark and light alleles will have a medium skin color. The more dark alleles inherited, the darker the skin color. In polygenic inheritance, traits are determined by multiple genes, or polygenes.