What are the chances that a kitten born would have a different genotype than the sister's cat moo?

Which test would show positive results for orange juice

Lactase is essential for digesting lactose in milk. this enzyme is specific for this sugar. why? molecules and active sites vary in size; only properly sized molecules can fit. there is a precise compatibility between the active site and the lactose molecule. specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed. reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.

Explain why it’s important for scientists to study the sun. list at least two challenges researchers face when examining earth’s nearest star.