試題詳解

39.Which of the following statements is/are TRUE?
(A)Mitosis distributes exact copies of genetic material so the daughter nuclei are genetically identical to each other and identical to the mother nucleus from which they came.
(B)The phenotypic ratio of 1:2:1 is characteristic of the F-2 of a monohybrid cross where dominance is lacking.
(C)Crossing over involves the exchange of parts between homologous chromosomes.
(D)Meiosis is often called "reduction division" because the genetic material is reduced by half.
(E)Most genes are probably pleiotropіc.