Hemophilia is an X-linked recessive disorder (Xh) that is passed through generations and can be traced by using a pedigree. John is an empty square with a x Upper H Y genotype.

Based on the pedigree that is shown, which describes John?
carrier for hemophilia
expresses hemophilia
does not have hemophilia
expresses hemophilia and died of complications

Which statement describes john tuzo wilson’s contribution to the theory of plate tectonics?

Which of the following is the source of energy for photosynthesis? a.) glucose b.) chlorophyll c.) carbon dioxide d.) sunlight

Scientists are conducting a study on the effectiveness of a new drug on memory loss. they are giving some of the test subjects the new drug to find out if it improves their long-term memory. which are possible limitations of this study? check all that apply. a) test subjects may want to participate in additional experiments. b) test subjects may think they should be paid more. c) test subjects may get bored and want to quit early. d) test subjects may have to travel during the experiment. e) test subjects may have full-time jobs. this is multiple choice. you for the !