Question

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 b is for a normal - sized body, and the allele b is for a dwarf body. basil, a rat from this group, has a dwarf body. basil has two alleles for a dwarf body. based on this information, what is basils genotype for the body size gene? bb a dwarf body bb a normal - sized body

Explanation:

The genotype refers to the specific combination of alleles for a gene. The problem states Basil has two alleles for dwarf body, which is represented by the allele $b$. A genotype with two identical recessive alleles for this trait is written as $bb$. The other options are either a dominant genotype (BB) or phenotypes (physical traits, not genetic makeup).

Answer:

bb