Biotechnology and its Applications — BIOLOGY STD 12 Science — Question

While creation and presence of variation are directionless, natural selection is directional as it is in the context of adaptation. Comment.

Answer the following questions:
State the principle of independent assortment.

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.

1. Is this representation indicating a normal human or a sufferer from certain related genetic disease? Give reason in support of your answer.
2. What difference would be noticed in the phenotype of the normal and the sufferer related to this gene?
3. Who are likely to suffer more from the defect related to the gene representedthe males, the females or both males and females equally? And why?

Write a note on cultural and religious importance of biodiversity Which type of conservation measures, in situ or ex-situ will help the larger number species to survive? Explain.

Study the graph given below and answer the questions that follows.

1. Write the status of food and space in the curves A and B.
2. In the absence of predators, which one of the two curves would appropriately depict the prey population?
3. Time has been shown on X-axis and there is a parallel dotted line above it. Give the significance of this dotted line.

What are the major functions of male accessory ducts and glands?

Write the causes and symptoms of pheny ketonuria and sickle cell anemia.

The image below describes the molecular diagnostic procedures.

i. Write any two biochemical/molecular diagnostic procedures for early detection of viral infection.
ii. Explain the principle of any one of them.