Mice of the yy-gray, Yy-yellow, YY-genotype die at the imbryonic stage. What will the offspring

Mice of the yy-gray, Yy-yellow, YY-genotype die at the imbryonic stage. What will the offspring of the following parents be: yellow x gray, yellow x yellow? In which cross, a more numerous litter can be expected.

Presumably y is gray mice, У is yellow mice.

Parents: Yy × yy

Gametes: y y y

Prospective offspring: Yy yellow, yy gray mice.

Parents: Yy × Yy

Gametes: Y y Y y

Prospective offspring: YY yellow, will die in the embryonic stage, Yy yellow, Yy yellow, yy gray. Considering that mice of the YY genotype die at the embryonic stage, more numerous offspring should be expected from the crossing of yellow (Yy) and gray (yy) mice.