Duchenne muscular dystrophy is a serious condition caused by a recessive allele of a gene on the human X chromosome. The patient
s have muscles that weaken over time because they have absent or decreased dystrophin, a muscle protein. They rarely live past their 20s. How likely is it for a woman to have this condition? O One-half of the daughters of an affected man would have this condition. O Very rarely: it is rare that an affected male would mate with a carrier female. Women can never have this condition. O One-fourth of the daughters of an affected father and a carrier mother could have this condition. Only if a woman is XXX could she have this condition.
One-half of the daughters of an affected man would have this condition.
Explanation:
Each daughter born to a woman that is positive for a dystrophin mutation on one of her two X chromosomes possess a 50 percent likelihood of possessing the mutation and also becoming a carrier. Carriers at times do not show the disease symptoms but may give birth to a child that has the mutation or the disease condition. DMD carriers do have a higher chance of cardiomyopathy.
A man with DMD cannot transfer the affected gene to his sons since he passes to his son a Y chromosome, not the X chromosome. But he will definately transfer it to his daughters, since each daughter possess her father’s only X chromosome resulting in the daughters being carriers.
Hence, One-half of the daughters of an affected father and a carrier mother could have this condition.
Explanation: a small(ish) strip of land that isn't sprayed between the cultivated plot and the water to filter out the chemicals and stop it from reaching the water
Infants exhibit a proximodistal pattern of growth meaning more proximal to the median or central muscles (i.e. trunk) will be the first one to exhibit movements then followed by more peripheral muscles (i.e. arms and thighs) then going distally to the forearms and legs and eventually to fine motor movements in the fingers and toes.
