Which of the following genotypes would you not expect to fin

Which of the following genotypes would you not expect to find among the offspring of a SsYy times ssyy test cross: ssyy SsYy Ssyy ssYy SsYY

Solution

E. SsYY

Offspring with the above combination will not be possible as one parent is recessive ssyy, so it is not possible for offspring to receive two Y’s from both the parents.

It can be understood by seeing the below dihybrid cross

Possible gametes from SsYy is SY, Sy, sY and sy.

Possible gametes from ssyy is sy.

SY

Sy

sY

sy

sy

SsYy

Ssyy

ssYy

ssyy

	SY	Sy	sY	sy
sy	SsYy	Ssyy	ssYy	ssyy