A) Y chromosome
B) X chromosome
C) XX chromosome
D) None of the above
Correct Answer: A
Solution :
XX-XY type of sex determination is found in human beings, Drosophila and in plants like Cocdnia, Smilax, Cannabis, Melandrium etc- H.E. Warmke (194) worked out sex determination in Melandrium album and described that a plant is male whea Y-chromosome is present and female when Y- chromosome is absent. In Dioscorea the male contains autosomes and one X-chromosome and are designated as XO while the female contains autosome and two X-chromosomes.
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