Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

Differentiate between an annual and a biennial plant. Provide one example of each.

The following graph AE represents the organismic response to certain environmental condition (e.g. temperature)

1. Which one among A and B depicts conformers?
2. What does the other line graph depict?
3. How do these organisms differ from each other with reference to homeostasis?
4. Mention the category to which humans belong. Internal level.

What is DNA polymorphism? Why is it important to study it?

Different animals respond to changes in their surroundings in different ways. Taking one example each, explain "some animals undergo aestivation while some others hibernation". How do fungi respond to adverse climatic conditions?

1. Write the desirable characters a farmer looks for in his sugarcane crop.
2. How did plant breeding techniques help north Indian farmers to develop cane with desired characters?

How do genes and chromosomes share similarity from the point of view of genetical studies?

Write any four differences between Vasa efferentia and Vasa deferentia.

Given below is the representation of amino acid composition of the relevant translated portion of b-chain of haemoglobin, related to the shape of human red blood cells.
What difference would be noticed in the phenotype of the normal and the sufferer related to this gene?

What do you understand by connecting Link? Explain their importance in biological evolution by giving suitable examples.

How are the following used in biotechnology?

1. Plasmid DNA
2. Recognition sequence
3. Gel electrophoresis