In a Three Point Test Cross There Are Two Gb

question 35

Multiple Choice

In a three point test cross there are two gb bt cq progeny and four + bt + progeny out of a hundred progeny,which are the two rarest groups.What can you conclude?

• A) The order of the genes is gb cq bt.
• B) The 6 progeny are the result of a double crossover.
• C) The genes are tightly linked.
• D) The order of the genes cannot be determined.
• E) The order of the genes is bt gb cq.