Question

Pollen culture produces
A. Haploid plants where every gene can express its effect
B. Homozygous diploid plants
C. Abundant seeds of rare plants
D. Abundant pollen in male sterile plants

Answer 1

Pollen, a mass of microspores which typically appear as fine dust in a seed plant. Each pollen grain is a minute body of varying shape and structure, shaped in the male seed-bearing plant structures and transported to the female structures where fertilisation takes place by various means.

Complete answer:
Pollen culture is a haploid plant processing technique through the cultivation of pollen grains collected from an anther of a plant in an aseptic state on artificial media of established composition. Guha and Maheshwari discovered the technique. The pollen was obtained by squeezing the hypochlorite anthers after surface sterilisation. The pollen acquired was cultivated in the nutrient media. The pollen grows into a callus that is treated with auxin, encouraging rooting and stimulating cell maturation, differentiation and, eventually, encouraging stem growth when treated with cytokinin. The haploid plants were developed because cytokinin stimulates the differentiation of the cells triggered by gene expression. The expressed genes generate and demonstrate their effects on hormones. Florigen hormone, for instance, is released for blooming.
One or more vegetative cells and a reproductive cell consist of pollen. The male gamet is not a pollen grain itself. The vegetative cell forms the pollen tube that develops to meet the unfertilized ovules in angiosperms and some gymnosperms, and the sperm source is the reproductive cell.

Hence, the correct answer is (A).

Note: Pollen grains are very common constituents of geologic sediments, both recent and ancient, because of their high resistance to decay, their widespread dispersal by wind and water, and their abundant development by plants. Pollen grains have provided a great deal of knowledge on the nature and geological past of terrestrial plant life because of these characteristics.