Which of the following statements is the best description of the life cycle of plants such as ferns?
plants have a two-part life cycle, spending part of their life in a diploid phase and part in a haploid phase.
plants have a single life cycle and are entirely diploid.
plants have a single life cycle and are entirely haploid.

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.