Genetics And Plant Breeding - Study Mode

[#756] The most important factor which determines stability of seed is
Correct Answer

(C) Moisture

Explanation

Solution: The most important factor which determines the stability of the seed is Moisture. Seeds attain a specific and characteristic moisture content when subjected to given levels of atmospheric humidity. This characteristic moisture content is called equilibrium moisture content. A small change in seed moisture content has a large effect on the storage life of the seeds. Therefore it is important to know the moisture content to make a reasonably accurate prediction of the possible storage life of each accession.

[#757] Modern population genetics was proposed by
Correct Answer

(C) Both A and B

Explanation

Solution: Modern population genetics was proposed by Hardy and Weinberg. The Hardy-Weinberg equation is a mathematical equation that can be used to calculate the genetic variation of a population at equilibrium. In 1908, G. H. Hardy and Wilhelm Weinberg independently described a basic principle of population genetics, which is now named the Hardy-Weinberg equation. They discovered that in an infinitely large population that mates randomly according to Mendel's laws, the frequencies of the genotypes obtained from two alleles remain constant through generations.

[#758] In Okra, production of foundation seed needs an isolation distance of
Correct Answer

(C) 200 metres

Explanation

Solution: In Okra, the production of foundation seed needs an isolation distance of 200 metres. Foundation seed, also known as basic seed, is the descendent of breeder seed and is produced under conditions that ensure maintaining genetic purity and identity. Isolation distance is the minimum separation required between two or more varieties of the same species to keep seed pure.

[#759] Type of fruit in citrus is
Correct Answer

(B) Hespidium

Explanation

Solution: The type of fruit in citrus is Hespidium. Hesperidium is a modified berry resulting from a single ovary. Citrus fruits are classified as a hesperidium. The fruit consists of 8 - 16 carpels that form the core of the fruit or segments that contain the seeds and juice. Citrus fruits are characterized by the presence of an outer rind or skin.

[#760] The tissues which nourishes microspore is
Correct Answer

(C) Tapetum

Explanation

Solution: The tissue which nourishes microspores is Tapetum. 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 the innermost cell layer in the anther, which surrounds the developing pollen mother cells (PMCs) and/or microspores supplying nutrition and enzymes required for microsporogenesis and pollen maturation. Tapetum is important for the nutrition and development of pollen grains, as well as a source of precursors for the pollen coat.