Tim and Stephanie are devastated when they find out their newborn son has hemophilia - an x- linked recessive disease. Tim is shocked because neither he nor his wife have hemophilia. He
figured if his son has the disease, he must have gotten it from him. Is Tim correct in his
thinking? Explain. Also explain what genotypes Tim and his wife must have for neither of them
to have the disease, but to have a son who has it.

First of all, hemophilia is an x-linked recessive and recessive disease. So it's a genetic disease.

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.