Tay sach's disease is a fatal genetic condition, in which affected individuals cannot metabolize fats properly. children who inherit the disease rarely live past the age of five. the disease is caused by the presence of a homozygous recessive gene. if a child has tay sach's disease, what would her parents' genotypes be?

The images show two species of tree frogs in a particular region. the gray tree frogs are adapted to the trees of the woodlands, while the green tree frogs can survive in woodlands or grasslands. the gray frog was abundant in the woodlands. because of climatic changes, most of the trees in the region died, and the woodlands changed to grasslands. in such a case, the . the gray tree frog is closely related to the green tree frog genetically, but they have different mating calls. this suggests that speciation occurred because of .