Which of the following is not a difference between mitosis and meiosis? (a)a tetrad is only formed during meiosis. (b)recombination only occurs during meiosis. (c)dna is duplicated once for mitosis, but twice for meiosis. (d)mitosis ends in two diploid cells, while meiosis ends in four haploid cells.

4. multiple crosses were made between true-breeding lines of black and yellow labrador retrievers. all the f1 progeny were black. when these progeny were intercrossed, they produced an f2 consisting of 91 black, 39 yellow and 30 chocolate. a. propose an explanation for the inheritance of coat color in labradors. b. propose a biochemical pathway for coat color determination and indicate how the relevant genes control coat coloration.