MCQ
While planning for an artificial hybridization programme involving dioecious plants, which of the following steps would not be relevant:
- ABagging of female flower.
- BDusting of pollen on stigma.
- CEmasculation.
- DCollection of pollen.
In case of dioecious plant, male and female flowers are not usually on a single plant. Hence, emasculation may not be necessary in certain cases.
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$(1)$ Haemophilia is a sexlinked recessive disease.
$(2)$ Down’s syndrome is due to aneuploidy.
$(3)$ Phenylketonuria is an autosomal recessive gene disorder.
$(4)$ Sickle cell anaemia is an $X$-linked recessive gene disorder.
Choose the correct option for $A , B$ or $C$ respectively