Steps in a reproductive process used to produce a sheep with certain traits are listed below. Step 1 — The nucleus was removed from an unfertilized egg taken from sheep A. Step 2 — The nucleus of a body cell taken from sheep B was then inserted into this unfertilized egg from sheep A. Step 3 — The resulting cell was then implanted into the uterus of sheep C. Step 4 — Sheep C gave birth to sheep D. Which sheep would be most genetically similar to sheep D?

Explanation:

As given;  

Step 1:  The nucleus was removed from the egg which was unfertilized and,

which is taken from sheep A, means that the egg was from sheep A.

Step 2 : The nucleus of a body cell which is taken from sheep B was then

inserted into this unfertilized egg which is taken from sheep A. Now the egg contain nucleus of sheep B.

Step 3 : The resulting cell containing nucleus of sheep B was then implanted into the uterus of

sheep C.

Step 4 : finally Sheep C gave birth to a  sheep named sheep  D.

Sheep B would be most genetically similar to sheep D, because the nucleus was taken from sheep B,  and the sheep D  is the new born which is  formed from the nucleus of sheep B.

dna is made up of six smaller molecules -- a five carbon sugar called deoxyribose, a phosphate molecule and four different nitrogenous bases (adenine, thymine, cytosine and guanine).