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2. Which of the following is an example of a polygenic trait?

A. the flower color of a plant is determined by how three different alleles are paired in the plant.

B. A dominant form of gene determines short ear length in an animal while a recessive form determines long ear length

C. Spotted wings on a species of awl form as the result of two alleles that are both expressed equally.

D. Human height is determined by several genes located on different chromosomes.

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I  think the correct answer from the choices listed above is option D. Human height is determined by several genes located on different chromosomes which is an example of a polygenic trait. These traits are being controlled by more than one gene. Hope this answers the question.

Human height is determined by several genes located on the different chromosomes. This is an example of polygenic trait.

Further Explanation:

Alleles are defined as the different type of the same gene. DNA is composed of different nucleotides and consists of genetic information in the form of genes. Alleles can influence the function of the gene as they determine particular character such as skin color and eye color that can be inherited from parents to the offspring through sexual reproduction.  

The polygenic traits are affected by the number of alleles. In this circumstance, there are more than twenty genetic loci present, which signify that there must be a larger quantity of alleles for all the loci.

Human height is determined by more than a few genes present on different chromosomes which are an example of a polygenic trait. These traits are mainly reflected by many genes. So, human height is an example of the polygenic trait.

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Answer Details:

Grade: High School  

Subject: Biology

Topic: Glaucoma disease

Keywords:

Gene, polygenic trait, loci, sexual reproduction, allele, color eye, skin color, DNA, genetic information, genetic loci, offspring, human height.

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