Consider the possible genotypes of the offspring of two heterozygous brown goats. The ratio of brown to white offspring in this case would be

A) 1:3.
B) 2:2
C) 3:1.
D) 3:4

Question

Consider the possible genotypes of the offspring of two heterozygous brown goats. The ratio of brown to white offspring in this case would be

A)	1:3.	
B)	2:2	
C)	3:1.	
D)	3:4

anonymous · Answer

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rushwr · Answer

What do u think the answer is ?

rushwr · Answer

Your punnet square is correct !

anonymous · Answer

I think its either A or B, possibly C.

rushwr · Answer

Since brown is dominant over white all the offsprings with Bb phentype shows brown colour !  So can u guess now ? And also the recessive phenotype is shown only during homozygous conditions :)

rushwr · Answer

So the final off springs have following gentypes nah
BB
Bb
Bb
bb
Out of the 4 BB, Bb and Bb shows brown hair colour due to  the presence of the dominant allele "B". 
So we have got 3 brown haired goats. 
bb is the only one with white hair. SO the ratio will be 3:1 
I hope you got it ?

anonymous · Answer

I understand now. Thanks!

rushwr · Answer

Your welcome :)