You have round polka dotted round is dominant and you cross

You have round polka dotted (round is dominant), and you cross this with a round solid (solid is recessive) mouse. Show all possibilities with the Punnett squares of possible offspring.

Solution

There are many possibilities if parent has dominant trait, they are in heterozygous or homozygous both conditions.

Round polka dotted RRSS / RrSS / RrSs/ RRSs       x          RRss or Rrss round solid

If RRSS x RRss

Then progenies are RRSs

If RRSS x Rrss

Then progenies are RRSs and RrSs

If cross between RrSS and RRss

Then progenies are

Gametes

Rs

RS

RRSs

rS

RrSs

If cross between RrSS and Rrss

Gametes

rs

Rs

RS

RrSs

RRSs

rS

rrSs

RrSs

If cross between RrSs and RRss

Gametes

Rs

RS

RRSs

rS

RrSs

Rs

RRss

rs

Rrss

If cross between RrSs and Rrss

Gametes

Rs

rs

RS

RRSs

RrSs

rS

RrSs

rrSs

Rs

RRss

Rrss

rs

Rrss

rrss

If cross between RRSs and RRss

Gametes

Rs

RS

RRSs

Rs

Rrss

If cross between RRSs and Rrss

Gametes

rs

Rs

RS

RrSs

RRSs

Rs

rrss

RRss

Gametes	Rs
RS	RRSs
rS	RrSs