Genetics And Plant Breeding - Study Mode

[#281] The method in which morphologically similar plants are selected and their seeds are bulked after harvesting the method is
Correct Answer

(D) Mass selection

Explanation

Solution: The method in which morphologically similar plants are selected and their seeds are bulked after harvesting the method is Mass selection. This method of selection depends mainly on the selection of plants according to their phenotype and performance. The seed from selected plants is bulked for the next generation. This method is used to improve the overall population by positive or negative mass selection.

[#282] Introgression can be defined as
Correct Answer

(A) Transfer of a few genes from one species into the full diploid chromosome complement of another species

Explanation

Solution: Introgression can be defined as the Transfer of a few genes from one species into the full diploid chromosome complement of another species. It refers to the transfer of genetic material between species following hybridization and backcrossing to the parental species. It is the gradual movement of genes from one species into the gene pool of another when there is some opportunity for hybridization between them.

[#283] 'Colchicine' interferes with
Correct Answer

(C) Formation of spindle fibres

Explanation

Solution: 'Colchicine' interferes with the Formation of spindle fibres. The alkaloid drug, colchicine, extracted from the corm of the autumn crocus (Colchicum autumnale), arrests mitosis in metaphase by interfering with the formation of spindle fibrils, thereby retarding the division of the centromeres and preventing the division of the centrioles.

[#284] Helicoids inflorescence is found in
Correct Answer

(D) Potato

Explanation

Solution: The helicoid inflorescence is found in potatoes. Helicoid an inflorescence, or cyme, is in which each flowering branch gives rise to one lateral branch that is coiled snail-like and then expanded. In this type flowering branch gives rise to only one lateral branch, hence it forms helicoid inflorescence.

[#285] CTCRI located at
Correct Answer

(B) Trivandrum

Explanation

Solution: CTCRI located at Trivandrum. CTCRI is a constituent institute under the Indian Council of Agricultural Research (ICAR) and is the only research organization in the world dedicated solely to research on tropical tuber crops. The Institute was established in 1963 with its headquarters at Thiruvananthapuram, Kerala with an area of 48.19 hectares. The headquarters of ICAR - CTCRI is located at Sreekaryam at a distance 12 km away from Thiruvananthapuram International Airport and 10 km from Thiruvananthapuram Central railway station as well as Central Bus Station Thiruvananthapuram.