using the above set-up what is the phenotypic ratio of the offspring of this cross?

select one: a. 4: 0 b. 3: 1 c. 1: 1: 1: 1 d. 1: 2: 1 

Option B, 3 : 1

Explanation:

It is given that

H - represents the shiny object allele

h - represents the dull object allele

Also H is dominant over h

Now punnet representing the the cross between parents having genotype "Hh" is as follows -

Hh

HHHHh

hHhhh

Out of four allele, only genotype "hh" represents the phenotype of dull object.

Hence, phenotype ratio is as follows -

Shiny object : dull object

3 : 1

Hence, option B is correct