I think the end of the question is "g" not "c". To get the offspring wanted, there are two types of genotype, one is TTgg, the other one is Ttgg. The chance of getting TT or Tt is 1-(1/2)*(1/2)=3/4. The chance of getting gg is (1/2)*(1/2)=1/4. So the total chance is (3/4)*(1/4)=3/16.
D) Vaccines work to fight the disease
Mark with crown!
Polar and Ionic compounds
Duchenne muyscular dystrophy is caused by a mutation on the X chromosome, so a male gets it from his mother's X, if she is a carrier. The male child gets a Y and no X from his father, so the disease is always transmitted through the X from the mother. If a female gets Duchenne muscular dystrophy she has to have two X chromosomes, one from a carrier mother and another from from an affected father. This is virtually impossible because most males die before childbearing age and there is no way a female child can get an X from a man who does not live long enough to procreate. About eight percent of carrier women do show some muscle weakness, but they do not have the disease.
