Hunter syndrome is a progressively debilitating recessive disorder that is inherited on the X chromosome.

A father without Hunter syndrome and an unaffected carrier mother have a child.
Which of the following statements is true?

Choose 1

(Choice A)
A
They have a 50% chance of having an affected daughter.

(Choice B)
B
They have a 100% chance of having an affected son.

(Choice C)
C
All of their children will be unaffected carriers.

(Choice D)
D
No daughter they have will be affected.

A

Explanation:(this took me a long time to do) it has a 50% chance of her child being a female with hunter syndrome or a male with hunter syndrome  

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.