Hemophilia is an inherited (genetic) disorder, in which your blood doesn't clot normally because it lacks sufficient clotting factors. Before medical advances, this disorder could be deadly if the individual suffered even the smallest bump or cut. Alice married Louis of Hesse and had 6 children. Fred was the only child who was afflicted with hemophilia. The remaining family line is also shown in the pedigree. Do males or females appear to show a higher frequency of having this disorder

The hypothesis of continental drift states that earth's continents, which are located on tectonic plates, move relative to each other. which of the following is true of the movement of the tectonic plates? a. tectonic plates only move once every million years. b. they move at a rate of approximately 5 centimeters per year. c. tectonic plates never move, only the continents located on them do. d. their movements are very rapid and occur at random times.

As a small change in a person's dna can cause a genetic disorder

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.