In a group of guppies, some individuals have a gray body and others have a golden body. In

this group, the gene for the body color trait has two alleles. The allele B is for a gray body,

and the allele b is for a golden body.

Fishie, a guppy from this group, has a gray body. Fishie has one allele for a gray body and

one allele for a golden body.

Based on this information, what is Fishie's genotype for the body color gene?

a gray body

Bb

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.