11.3 other patterns of inheritance

Front

What are polygenic traits?

Back

A trait controlled by 2 or more genes.

Front

In _______ , several genes control the phenotype.

Back

Polygenic trait.

Front

If a red flower and a white flower are bred together and they produce pink flowers, what does this demonstrate?

Back

Incomplete dominance.

Front

Are the characteristics of any organism only controlled by genes?

Back

No.

Front

What is incomplete dominance?

Back

When 1 allele is not completely dominant over the other.

Front

What is codominance?

Back

A situation in which the phenotypes produced by both alleles are completely expressed.

Front

What is the difference between incomplete dominance and codominance?

Back

Incomplete dominance results in a blend of traits, while codominance results in both traits being fully expressed.

Front

What role do environmental factors play in the expression of traits?

Back

Environmental factors can influence the expression of traits, meaning that not all characteristics are solely determined by genes.

Front

What is an example of a polygenic trait in humans?

Back

Human height is an example of a polygenic trait, as it is influenced by multiple genes.

Front

What is the significance of homologous chromosomes in inheritance?

Back

Homologous chromosomes carry the same genes but may have different alleles.