Context: In a group of rats, some individuals have a normal-sized body and others have a dwarf body. In this group, the gene for the body size trait has two alleles. The allele for a dwarf body (b) is recessive to the allele for a normal-sized body (B).
This Punnett square shows a cross between two rats.
What is the probability that a rat produced by this cross will have a dwarf body?
A. 3/4
B. 0/4
C. 2/4
D. 1/4
E. 4/4
Answer with the option's letter from the given choices directly.
Answer: B