Short Answer TypeWrite the types of sex-determination mechanisms the following crosses show. Give an example of each type
(i) Female XX with Male XO
Write the types of sex-determination mechanisms the following crosses show. Give an example of each type
(ii) Female ZW with Male ZZ
Name the scientist who suggested that the genetic code should be made of a combination of three nucleotides.
State how Agrobacterium tumifaciens has been made a useful cloning vector to transfer DNA to plant cells.
Agrobacterium is a pathogen that affects several dicots and delivers a piece of DNA known as ‘T-DNA’ to transform normal cells to tumor cells. This potential of Agrobacterium has been used to transfer desired gene into the plant. The desired gene is inserted in the T-DNA region and the bacterium is allowed to infect the plant. In this way, the desired changes are made in the plant.
Apart from being a part of the food chain, predators play other important roles. Mention any two such roles supported by examples.
Switch
