Hemophilia is a blood clotting disorder that is a sex-linked trait carried on the x chromosome. if a woman with hemophilia and a man without the disorder have two sons and two daughters, how many of their children would have hemophilia?

none

one

two

four

Why is a dominant allele called dominant

During the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.

This is collection of data made by comparing objects in standard units. in science, the units are metric.