B. X.
C. N.
D. Y.
Answer:
Glaucoma is polygenic trait.
Explanation:
As per given information, Glaucoma disorder is a phenotype regulate by three genes and more than 20 genetic loci. A genetic trait that is regulated by more than one gene is called polygenic trait.
Here, Glaucoma is regulated by three genes. This makes it a polygenic trait. The phenotype depends on the total number of dominant alleles of all the three genes.
The correct answers are sand dunes, beaches deltas.
The process of erosion creates sand dunes by the erosion of sand by the help of wind. The sand erosion or soil erosion can lead to the formation of the beaches or deltas. The erosion process cannot result in the formation of the mountains.
Mountains are as a result of volcanic eruption and is formed after the volcanic activity.