In some cats, black coat color (B) is dominant over brown (b) and a striped fur pattern (S) is dominant over a marbled fur pattern (s). You rescued a black striped cat from an animal shelter but could not determine its exact genotype. To do so, you mated the cat with a brown marbled cat. The mating produced 3 brown marbled, 2 brown striped, 2 black marbled, and 3 black striped. Immediately, you concluded the genotype of your rescued cat was:
a) BbSS.
b) BBSs.
c) BBSS.
d) BbSs.

Explanation:

B= black coat color (dominant)

b= brown coat color (recessive)

S= striped fur pattern (dominant)

s= marbled fur pattern (recessive)  

A cross is made between black striped cat(genotype unknown) and brown marbled cat (bbss genotype)

(here in this brown marbled cat is homozygous recessive)    

Resulting offsprings are:

3 brown marbled= both coat and fur color recessive

2 brown striped= coat color recessive fur color dominant

2 black marbled= coat color dominant fur color recessive

3 black striped= both coat color and fur color dominant

Crossing brown marbled cat with the genotypes given in options, the correct genotype of rescued cat comes out to be: BbSs