Caspar's genotype is HhRr.  These genes are located on the same chromosome,  so the haplotype is: H  R h   r   For this problem, there is no recombination between the genes. Knowing this, draw for yourself how these chromosomes should align and separate during meiosis.  Now, from the choices below, which gamete would represents a nondisjunction event in meiosis II?

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Embryology