Tay-Sachs is a single gene recessive allele. The disease always kills its victims before they can reproduce (and potentially pass on the defective allele). If every Tay-Sachs child dies before their 5th birthday, how does the defective allele get passed on to other babies?

Give examples of animals that live in sea and are considered mammals. ♡

Are the earth's ocean floor and continents the same age geologically? why or why not?

Which of these has happened to your food by the time it reaches your small intestine? a. all the macromolecules have been broken down completely. b. lipids and starches have been partially broken down. c. starches and proteins have been partially broken down. d. proteins and lipids have been broken down into subunits.