Problem: Why are recessive X-linked traits seen more in human males than in human females? Select all that apply.A. Males have an X chromosome, but females do not.B. Actually, X-linked traits are seen more often in females than in males, because they have two X chromosomes.C. Males don't have a second X chromosome to mask the effects of the first one.D. This phenomenon is due to X-inactivation.E. While females would need two of these alleles to express the recessive phenotype, males only need one.F. Sperm are more likely to carry an X chromosome than a Y chromosome.

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The physical traits of an individual (phenotype) would largely depend the genotype. For an individual to show a recessive trait, the individual should have the recessive allele on all of its homologous chromosomes. 

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Problem Details

Why are recessive X-linked traits seen more in human males than in human females? Select all that apply.

A. Males have an X chromosome, but females do not.

B. Actually, X-linked traits are seen more often in females than in males, because they have two X chromosomes.

C. Males don't have a second X chromosome to mask the effects of the first one.

D. This phenomenon is due to X-inactivation.

E. While females would need two of these alleles to express the recessive phenotype, males only need one.

F. Sperm are more likely to carry an X chromosome than a Y chromosome.