How do nucleotides and hydrogen bonds affect the structure of dna?

If you have a difficult time knowing where your hand is without looking at it you may be having a problem with your what ?

What is the compliment dna strand to the following sequence: ttgactaggcta

Duchenne muscular dystrophy is a serious condition caused by a recessive allele of a gene on the human x chromosome. the patients have muscles that weaken over time because they have absent or decreased dystrophin, a muscle protein. they rarely live past their twenties. how likely is it for a woman to have this condition? a) women can never have this condition. b) one-fourth of the daughters of an affected man would have this condition. c) one-half of the daughters of an affected father and a carrier mother could have this condition. d) only if a woman is xxx could she have this condition.