Answer Happy

Answer key denotes B as the right answer
Two Drosophila strains each carry a different version of the P element, a DNA transposon, integrated at different sites in their genomes. One strain carries a single copy of P(wc); the other strain, a single copy of PlacW). In both strains, these insertions are stable: no transposition to any other site is seen, over many generations. When the two strains are crossed together and the F1 offspring are outcrossed to give an F2 generation, some of the F2 generation carry insertions of PlacW) at new sites. No new insertions of P/wc) are observed. Which of the following statements about these Pelements is most likely TRUE? A. VAUDE B. C. D. E. P(lacW) encodes a functional transposase protein, but P/wc) does not. P(wc) encodes a functional transposase protein but does not have inverted repeat sequences. Neither P(lacW) nor P/wc) encodes a functional transposase protein. P(wc) has inverted repeat sequences but lacks a functional transposase protein. Neither P(lacW) nor P(wc) have inverted repeat sequences.