Question

Post- zygotic sexual incompatibility can be overcome by:
A) Protoplast fusion
B) Ovule culture
C) In Vitro pollination
D) Bud pollination

Answer 1

Hint: The mechanism of reproductive isolation is an assortment of evolutionary mechanisms, practices, behavior and physiological processes required for speciation. They prevent individuals from various species from producing offspring, or ensure that the offspring is sterile. These obstructions keep up the respectability of animal varieties by decreasing gene flow between related species.

Complete answer:
Postzygotic barriers are considered as a mechanism that blocks proliferation or reproduction after preparation and zygote development. Post-zygotic sexual incompatibility may happen due to some Postzygotic barriers which includes the production of hybrid individuals that can survive past the embryonic stages (hybrid inviability) or the formation of a hybrid that is sterile and unfit to produce offspring (hybrid sterility).

At the point when fertilization happens and a zygote structures, postzygotic barriers can prevent reproduction. Hybrids as a rule can't shape typically in the womb and basically don't survive past the embryonic stages; this is called hybrid inviability. In another postzygotic circumstance, reproduction leads to the birth and development of hybrids that are sterile and unfit to reproduce offspring of their own; this is called hybrid sterility.

Physical parameters, especially electrostimulation, additionally improve the development of protoplasts and protoplast-derived cells in culture. DNA uptake into protoplasts is presently a daily practice and universally accepted process in biotechnology for introducing and assessing both short term (transient) and long term (stable) expression of genes in cells and plants which are regenerated. Critically, protoplast fusion defeats pre-and post-zygotic sexual incompatibility barriers and creates novel germplasm through new atomic cytoplasmic combinations.

Hence, the correct answer for this question is A, i.e. Protoplast fusion.

Note:Isolated protoplasts are also one of a single cell system for assessing aspects of ultrastructure, genetic qualities and physiology, with potential for the biosynthesis of novel secondary products, including commercially significant recombinant proteins (for example antibodies), and as systems in toxicity screening.