the genotypes of their children are:ss,Ss,SS,ss,Ss,Ss and SS.what must be the genotype of both parents be?

Question

draw a punnett squARE and list all genotypes and phenotypes.

Answer 1

The parents must be Ss x Ss.

You can figure it out by logic.
1. If children are SS, then each parent must have an S.
2. If children are ss, then each parent must have an s.
3. That means each parent must be Ss.
4. Check to see if they can also have the children Ss ... which is possible.

Parents: Ss x Ss
Gametes from first parent go on the side of the square: S and s.
Gametes from second parent go on the top of the square: S and s.

First row of boxes int he square: SS and Ss
Second row of boxes in the square: sS and ss

Genotype ratio: 1 SS: 2 Ss: 1 ss

We don't know what the phenotype ratio is because you haven't told us what the trait is.

Answer 2

the parents are both having Ss genotype. this can be easily figured out on the basis of the presence of both SS and ss

Answer 3

Ss - Ss (Parents).
↓ ↓ ↓
SS - Ss - ss (All children types possible).

Answer 4

do a google or try CF web site