SCIENTIFIC INQUIRY/ Science Practice 6 Butterflies have an X-Y sex determination

Question

SCIENTIFIC INQUIRY/ Science Practice 6 Butterflies have an X-Y sex determination system that is different from that of flies or humans. Female butterflies may be either XY or XO, 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 to explain how nondisjunction during the first mitosis might have produced this unusual-looking butterfly. SYTHESIZE YOUR KNOWLEDGE

Explanation / Answer

The organism that contain both males and females charecterstics ,it is mainly used in the entomology , The can be seen in the butterflies where both females and males harecterstyics can be seen physically because of the sexual dimorphism . Thy can have the bilateral symmetry one side is male and one is female . Non disjuction members of pair homologous do not move a part properly during meiosis 1 or sister chromatids fail to seperate during meiosis 11 . In butterfly XY is the females and XX is the males , normally when cell divides the DNA first copied and then a complete copy of the DNA is passed to each of the daughter cell ,However when this two chromosomes do not deattach in XX male during the first zygotic division then individual can develop that male on one side and female is on other side

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