Shown here is a pair of homologous chromosomes in a cell soo

Shown here is a pair of homologous chromosomes in a cell soon to undergo division (only chromosomes are shown; crossovers, if present, are not shown): (a) After the ensuing anaphase and telophase, you find that the daughter cells have the following configuration (assume for the sake of this question that you can detect chromosomes in telophase): Was the division mitosis or meiosis? Explain. (b) Suppose, instead, that they had this configuration: Again, was the division mitosis or meiosis? Explain.

Solution

b) This configuration is mitosis. In this, the chromosomes have already duplicated, condense and attach to spindle fibers. they are pulled to opposite ends and form two genetically identical daughter nuclei.

a) In A there is no proper nondisjunction resulting. One chromosome is not segregated to the daughter cell.