When a cross is made between AaBb x AaBb, what fraction of the offspring is able to produce a genotype that is heterozygous for both characteristics? A.3/16
B.9/16
C.1/16
D.4/16

Witch theory suggests all living things are made up of cell or cells

What is the role of dna ligase in the elongation of the lagging strand during dna replication?

Which of the following best describes the purpose of the parathyroid hormone? a. it decreases the blood calcium level and decreases blood phosphorus level. b. it decreases the blood calcium level and increases the blood phosphorus level. c. it increases the blood calcium level and increases blood phosphorus level. d. it increases the blood calcium level and decreases blood phosphorus level.