Rosie is . . . . . . .

Transgenic animals are used to study which of the following aspects of normal physiology and development?

'Rosie',a transgenic cow,is known to produce a type of milk which has all the following characteristics,except:

In animal cloning,the fertilized egg is removed from the mother's uterus,and...

Select the incorrect pair.

Read the following four statements $(A-D)$ and identify the mistakes in two of them.
$(A)$ The first transgenic cow,Rosie,produced milk which was human alpha-lactalbumin enriched.
$(B)$ Restriction enzymes are used in the isolation of $DNA$ from other macromolecules.
$(C)$ Downstream processing is one of the steps of $rDNA$ technology.
$(D)$ Disarmed pathogen vectors are also used in the transfer of $rDNA$ into the host.
Which of the two statements have mistakes?