試題詳解

4. In peas, tall (T) is dominant to short (f), red flowers (R) is dominant to white flowers (r), and wide leaves (W) is dominant to narrow leaves (w). A tall plant that has red flowers and wide leaves is crossed to a short plant that has white flowers and narrow leaves. The resulting progeny are shown in the table.

If two or more of the genes are linked, what is the map distance that separates them?
(A) None of the genes is linked to another.
(B) 50 m.u.
(C) 24 m.u.
(D) 12 m.u.

(E) 4 m.u.