Genetics And Plant Breeding - Study Mode

[#626] Pusa 1088, Pusa 1103 and Pusa 1105 are new varieties of
Correct Answer

(A) Chickpea

Explanation

Solution: Pusa 1088, Pusa 1103 and Pusa 1105 are new varieties of chickpeas. Pusa 1088 is the variety of chickpeas released by Pusa. The average yield of this variety is 25 - 35 q/ha. It is resistant to Fusarium wilt, root rot and stunt virus. It has tolerance against drought. Pusa 1103 is a desi variety of chickpea released by IARI. The average yield is 24 q/ha. It is the first variety developed by using a wild species (C. reticulatum). It is resistant to wilt, root rot and bruchids. Pusa 1105 is Kabuli variety of chickpea released by IARI in 2005. The average seed yield is 25 q/ha. It is highly tolerant against drought. Moderately resistant to soil-born diseases.

[#627] The O 2 evolved during photosynthesis comes from
Correct Answer

(D) H 2 O

Explanation

Solution: The O 2 that evolved during photosynthesis comes from H 2 O. Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities. Oxygen evolved during this process is evolved from the hydrolysis of water, and the hydrogen freed by the splitting of water is used in the creation of further compounds.

[#628] When the embryos develop without fertilisation?
Correct Answer

(D) None of these

Explanation

Solution: When the embryos develop without fertilization is called parthenogenesis, not given in the option. Parthenogenesis is a natural form of asexual reproduction in which the growth and development of embryos occur in a gamete without combining with another gamete. Parthenogenetic offspring in species that use either the XY or the X0 sex-determination system have two X chromosomes and are female.

[#629] In seed testing, the grow out test is conducted to determine
Correct Answer

(C) Genetic purity

Explanation

Solution: In seed testing, the grow-out test is conducted to determine Genetic purity. Grow out test is a test that is conducted to determine the genetic purity of given seed lots. Genetic purity of seeds refers to the trueness to type. If the seed possesses all the genetic qualities that the breeder has placed in the variety, it is said to be genetically pure. Genetic purity is used to maintain a variety from generation to generation and in the management of genetic resources e.g. in genebanks.

[#630] Which one of the following sets is the correct sequence of events in the cell
Correct Answer

(A) Transcription, translation, protein synthesis

Explanation

Solution: Transcription, translation, and protein synthesis are the correct sequence of events in the cell. Transcription is the process of making an RNA copy of a gene's DNA sequence, and that by which RNA is used to produce proteins is called translation. Protein synthesis is further carried after the synthesis of RNA, into amino acids, and a chain of amino acids leads to the synthesis of protein in ribosomes and other cell organelles.