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

When does the circulatory system work with the respiratory system? a. during blood cell formation b. during cellular respiration c. during intestinal digestion d. during a viral infection

Which sentence best describes the relationship between chlorophyll and the chloroplast? a.) chlorophyll is a chemical found in a chloroplast. b.) chloroplast is a chemical found in a chlorophyll. c.) both chlorophyll and chloroplasts are found in animals. d.) both chlorophyll and chloroplasts make carbon dioxide.

What makes a dominant allele different from a recessive allele