Why are males more likely to be affected by X-linked traits than females? •Males are homologous and not hemizygous.
•Males have two X chromosomes.
•Males have three alleles for X-linked traits.
•Only one allele is required to express the trait

I think it's only one allele is required to express the trait.

Explanation:

glacial erosion, the picking up and movement of earth beneath a glacier, is also referred to as plucking. erosion and transportation of individual pieces of bedrock, especially large "joint block occur as a result of this glacial erosion. plucking is type of erosion in which rocks become frozen into the bottom and sides of the glacier.as the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.