Write the types of sex-determination mechanisms the following crosses show. Give an example of each type

(ii) Female ZW with Male ZZ

How are 'sticky ends' formed on a DNA strand? Why are they so called?

Construct an age pyramid which reflects a stable growth status of human population.

Write the types of sex-determination mechanisms the following crosses show. Give an example of each type

(i) Female XX with Male XO

Explain the basis on which he arrived at this conclusion.

Explain with the help of a suitable example the naming of a restriction endonuclease.

State how Agrobacterium tumifaciens has been made a useful cloning vector to transfer DNA to plant cells.

Apart from being a part of the food chain, predators play other important roles. Mention any two such roles supported by examples.

State the disadvantage of inbreeding among cattle. How it can be overcome?

Name the scientist who suggested that the genetic code should be made of a combination of three nucleotides.