i) First segment: A deletion of this segment gives rise to hermaphrodite flowers on XY plants.
ii) Second segment: A deletion of this segment gives rise to female flowers on XY plants.
iii) Third segment: A deletion of this segment Produces male sterile plants with abortive anthers.
iv) Fourth segment: Homologous to a segment of an X chromosome.
v) Fifth segment of X chromosome: Development of female reproductive organs.
b)XY female XX male: Found in Fragraris.
c) XX female XY1Y2 male: Found in Rumex, Humulux. Reunion between male and female produces two types of zygotes of male and female respectively.
d) XX female XO male: Found in Dioscorea and vassisneria.
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