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?

One important development during the 3rd trimester that will insulate the infant against changes in temperature is a. the deposition of fat under the skin b. the closing of the septum between c. the atria of the heart d. the beginnings of lung functioning e. the beginnings of light and sound sensing

Where in the cell are ribosomes made?

The illustration shown is an ovum, a female sex cell. a mutation in this cell may be passed to the woman’s offspring during a) birth. b) mitosis. c) dna replication. d) sexual reproduction