Butterflies have an X-Y sex-determination system that is different from that of flies or humans. Female butterflies may be either XY or X0, while butterflies with two or more X chromosomes are males. This photograph shows a tiger swallowtail gynandromorph, which is half male (left side) and half female (right side). Given that the first division of the zygote divides the embryo into the future right and left halves of the butterfly, propose a hypothesis that explains how nondisjunction during the first mitosis might have produced this unusual-looking butterfly.

Human Anatomy & Physiology (11th Edition)
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Butterflies have an X-Y sex-determination system that is different from that of flies or humans. Female butterflies may be either XY or X0, while butterflies with two or more X chromosomes are males. This photograph shows a tiger swallowtail gynandromorph, which is half male (left side) and half female (right side). Given that the first division of the zygote divides the embryo into the future right and left halves of the butterfly, propose a hypothesis that explains how nondisjunction during the first mitosis might have produced this unusual-looking butterfly.

 

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14. SYNTHESIZE YOUR KNOWLEDGE
Butterflies have an X-Y sex determination system that is different from that of flies
or humans. Female butterflies may be either XY or X0, while butterflies with two
or more X chromosomes are males. This photograph shows a tiger swallowtail
gynandromorph, which is half male (left side) and half female (right side). Given
that the first division of the zygote divides the embryo into the future right and
left halves of the butterfly, propose a hypothesis that explains how nondisjunction
during the first mitosis might have produced this unusual-looking butterfly.
Transcribed Image Text:14. SYNTHESIZE YOUR KNOWLEDGE Butterflies have an X-Y sex determination system that is different from that of flies or humans. Female butterflies may be either XY or X0, while butterflies with two or more X chromosomes are males. This photograph shows a tiger swallowtail gynandromorph, which is half male (left side) and half female (right side). Given that the first division of the zygote divides the embryo into the future right and left halves of the butterfly, propose a hypothesis that explains how nondisjunction during the first mitosis might have produced this unusual-looking butterfly.
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