Why are recessive X-linked traits seen more often in human males than in human f

Question

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

Males have an X chromosome, but females do not.

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

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

This phenomenon is due to X-inactivation.

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

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

Explanation / Answer

Answer: Males don’t have a second X chromosome to mask the effects of the first one.

and

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

the X-linked factors gets expressed double in females genearlly, hence, during gemet formation, one of the X-chromosomes gets silenced which is known as X-inactivation. For males only one X-chromosome is sufficient as there is no other X-chromosomes, where females defective in one of the X-chromosomes becomes heterozygous carrier due to masking by the other healthy allele in the other X chromosome.

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.