Question

Do all genes that contribute to a polygenic trait do so to the same degree?

Short answer

No, all genes that contribute to a polygenic trait do not contribute to the same degree; the effect varies from gene to gene.

Step-by-step solution

Understand Polygenic Traits

Polygenic traits are characteristics that are influenced by more than one gene pair and typically display a continuous distribution. These traits can be influenced by numerous genes, each making a small contribution to the overall phenotype.

Assessing Contribution of Each Gene

Each gene contributing to a polygenic trait may not have equal contributions. Some genes might have a larger effect, while others might have a smaller, marginal influence. This depends on a variety of factors, including the specific trait in question, the environment, and the gene's function and location.

Conclusion

Therefore, not all genes that contribute to a polygenic trait do so to the same degree. The degree of contribution varies from gene to gene, making every individual unique.