A woman is heterozygous for a recessive allele that causes X-linked hemophilia. This recessive allele has a mutation that makes a gene for a blood-clotting factor nonfunctional. Considering the implications of X-inactivation, the level of clotting factor in her blood is likely to be approximately that of a homozygous non-mutant woman.

Option- 1/2 ( half chances).

Explanation:

A woman is heterozygous for a recessive allele that causes X-linked hemophilia. This recessive allele has a mutation that makes a gene for a blood-clotting factor nonfunctional. Considering the implications of X-inactivation, the level of clotting factor in her blood is likely to be approximately 1/2 that of a homozygous non-mutant woman.

Six amino acids have side chains that are polar but not charged. these are serine (ser), threonine (thr), cysteine (cys), asparagine (asn), glutamine (gln), and tyrosine (tyr). these amino acids are usually found at the surface of proteins, as discussed in the proteins 2 module.