Haemophilia is more common in males because it is a:

Explanation

The correct option is d) Recessive trait carried by X-chromosome.Hemophilia is a genetic disorder that affects the blood's ability to clot properly. This condition is caused by mutations in genes located on the X-chromosome. Since males have only one X-chromosome, the presence of a single mutated gene is enough to cause the disorder. In females, who have two X-chromosomes, a functioning gene on one chromosome can often compensate for a defective gene on the other, making the disorder less common in females.Option A is incorrect because the Y-chromosome does not contain the gene related to hemophilia. Option B is incorrect because the disorder is not dominant nor linked to the Y-chromosome. Option C is incorrect as hemophilia is not a dominant trait; if it were, both males and females would exhibit symptoms equally.