37. A gray-bodied, normal-winged fly is crossed with a black-bodied, vestigial-winged fly. The F1 progeny is testcrossed. Among the resulting offspring, _____ is a parental type, and _____ is a recombinant type.
a. gray-bodied, normal-winged ... black-bodied, vestigial-winged
b. gray-bodied, vestigial-winged ... black-bodied, normal-winged
c. gray-bodied, normal-winged ... black-bodied, normal-winged
d. black-bodied, normal-winged ... black-bodied, vestigial-winged
e. black-bodied, normal-winged ... black-bodied, normal-winged

Question

37.	A gray-bodied, normal-winged fly is crossed with a black-bodied, vestigial-winged fly. The F1 progeny is testcrossed. Among the resulting offspring, _____ is a parental type, and _____ is a recombinant type.  
a.	gray-bodied, normal-winged ... black-bodied, vestigial-winged
b.	gray-bodied, vestigial-winged ... black-bodied, normal-winged
c.	gray-bodied, normal-winged ... black-bodied, normal-winged
d.	black-bodied, normal-winged ... black-bodied, vestigial-winged
e.	black-bodied, normal-winged ... black-bodied, normal-winged

alphadxg · Answer

Well recombinant types are carried on like this: Recombinant DNA (rDNA) molecules are DNA molecules formed by laboratory methods of genetic recombination (such as molecular cloning) to bring together genetic material from multiple sources, creating sequences that would not otherwise be found in biological organisms. Recombinant DNA is possible because DNA molecules from all organisms share the same chemical structure. They differ only in the nucleotide sequence within that identical overall structure.

Parental types - is either male or female part, so if it's anything other than that then they are recombinant.