Question

Glaucoma is a leading cause of blindness. Studies have linked a common form of glaucoma to three genes and more than 20 genetic loci. Which best describes glaucoma? a recessive trait that requires multiple recessive alleles to be expressed a polygenic trait that is influenced by the alleles of several genes a codominant trait that is expressed more often when more dominant alleles are present a dominant trait that depends on the presence of only one of many dominant alleles

Answer 1

Answer:

Question

Glaucoma is a leading cause of blindness. Studies have linked a common form of glaucoma to three genes and more than 20 genetic loci. Which best describes glaucoma?

Answer

(A) - a recessive trait that requires multiple recessive alleles to be expressed

Explanation:

Answer 2

Glaucoma is a polygenic trait influenced by the alleles of several genes.

• Polygenic phenotypic traits are those influenced by many genes, which interact to shape the phenotype.

• Polygenic traits exhibit a bell-shaped distribution in a population (i.e. they have a continuous distribution).

• Some examples of polygenic traits include, among others, height, body shape, skin color, weight, etc.

• A polygenic trait that is also affected by environmental factors is known as a multifactorial trait.

In conclusion, glaucoma is a polygenic trait that is influenced by the alleles of several genes.

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