Dentinogenesis imperfecta is a rare, autosomal, dominantly inherited disease of the teeth that occurs in about one in 8000 people (witkop, 1957). the teeth are somewhat brown in color, and the crowns wear down rapidly. assume that a male with dentinogenesis imperfecta and no family history of the disease marries a woman with normal teeth. what is the probability that: a. their first child will have dentinogenesis imperfecta and be death? b. their first two children will have dentinogenesis imperfecta and hear well? c. their first child will be a girl with dentinogenesis imperfecta?

How does pregnancy begin? a) a placenta forms in the uterus b) a sperm reaches an egg in the fallopian tubec) the blastocyst differentiates into two cell types d) contractions begin in the uterine wallapex

Which blood cell spend most of their time in the lymphatic system?

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.