Q1. Consider a cell that is 2n = 6. The cell is heterozygous for gene A, homozygous dominant for gene B and homozygous recessive for gene D. Gene A and gene B are on the same chromosome, but gene D is on a different chromosome to either A or B. Draw this cell at the following 3 stages: (Note: Make sure it is clear which chromosomes are homologous pairs! Don't forget to include spindle fibers and centrioles). a) Anaphase of mitosis (3 points) b) Anaphase I of meiosis (3 points) c) Anaphase II of meiosis (3 points) d) A nondisjunction event results in the fusion of chromosomes 1 and 2. However, the resulting gamete fertilizes a normal oocyte. What is the chromosome number of the gamete and resulting embryo? (1 point)

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