In humans the allele for normal blood clotting, H, is dominant to the allele for hemophilia, h. This is a sex linked trait found on the X chromosome. A woman with normal blood clotting has four children: a normal son, a hemophiliac son, and two normal. If the father has normal blood clotting. What is the genotype for each member of the family?

Which could be a pathway of food through an ecosystem

Are the layers of rock above and below the coal older or younger?

How do you think earths interior affects what is happening on the surface? 2. how do fossils support the continental drift hypothesis? 3. how does sea- floor spreading support the hypothesis of continental drift? 4.what do scientists observe when they studied the magnetic fields of rocks on the sides of mid-ocean ridges? 5. what is a tectonic plate ? 6. explain mantle convection 7.how can movements of the continents affect earths climate? 8. what occurs during drifting?