Genetics And Plant Breeding - Study Mode
[#611] Clone is generally
Correct Answer
(A) Heterozygous
Explanation
Solution: Clone is generally Heterozygous. Cloning is the process of producing individual organisms with identical or virtually identical DNA, either by natural or artificial means. It refers to the procedure of creating a new multicellular organism, genetically identical to another. This form of cloning is an asexual method of reproduction, where fertilization or inter-gamete contact does not take place.
[#612] The plants do retain a relatively higher level of hydration under soil or atmospheric water stress is known as
Correct Answer
(C) Dehydration avoidance
Explanation
Solution: The plants do retain a relatively higher level of hydration under soil or atmospheric water stress is known as Dehydration avoidance. A plant can retain a relatively higher level of hydration under conditions of soil or atmospheric water stress. Dehydration avoidance can be achieved either by reducing transpiration (water savers) or increasing water uptake (water spenders).
[#613] Seedless watermelon is a
Correct Answer
(C) Triploid
Explanation
Solution: Seedless watermelon is a Triploid. Seedless watermelons are triploid (3X) which causes them to be sterile, or seedless. The triploid seeds are created by crossing a normal diploid (2X) melon as the pollinator with a tetraploid (4X) parent. Each parent contributes half its respective chromosomes, 1X from one parent and 2X from the other. It is a sterile hybrid that is created by crossing male pollen for a watermelon, containing 22 chromosomes per cell, with a female watermelon flower with 44 chromosomes per cell.
[#614] Pigeon pea is the often cross-pollinated crop but Alfalfa is the
Correct Answer
(B) Cross-pollinated crop
Explanation
Solution: Pigeon pea is the often cross-pollinated crop but Alfalfa is the Cross-pollinated crop. In some crop plants, cross-pollination often exceeds 5 percent and may reach 30 percent. Such species are generally known as often cross-pollinated species. Cross-pollination, also called allogamy occurs when pollen is delivered to a flower from a different plant. Alfalfa, also called lucerne, is a perennial flowering plant in the legume family Fabaceae. Organic growers were concerned that GM alfalfa could cross-pollinate with their organic alfalfa, making their crops unsalable in countries that ban the growing of GM crops. Pigeonpea is often cross-pollinated by bees (Megachile spp.). The level of cross-pollination between plants ranges from 0 - 40%, depending on genotype and insect pollinator populations.
[#615] The tissue which nourish microspores is
Correct Answer
(A) Tapatum
Explanation
Solution: The tissue which nourishes microspores is Tapetum. Tapetum is the innermost cell layer in the anther. The tapetum is a specialized layer of nutritive cells found within the anther, of flowering plants, where it is located between the sporogenous tissue and the anther wall. Tapetum is important for the nutrition and development of pollen grains, as well as a source of precursors for the pollen coat.