Biotechnology and its Applications — BIOLOGY STD 12 Science — Question

Expand GEAC. Why was GEAC established? Mention the responsibilities assigned to this organisation.

When Morgan conducted a dihybrid cross on Drosophila like Mendel did with pea plants, the F, ratios deviated significantly from that of Mendels F, ratio. Write the explanation Morgan and his group gave for the observations they obtained from their experiments.
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Morgan carried out several dihybrid crosses in Drosophila and found F, ratios deviated very significantly from the expected Mendelian ratio. Explain his findings with the help of an example.

A 250kg cow produces 200g of protein per day but 250g of Methylophillus methylotrophus can produce 25 tonnes of protein Name this emerging area of research. Explain its benefits.

Draw a pyramid of biomass and pyramid of energy in sea. Give your comments on the type of pyramids drawn.

Who proposed the term evolution? What is evolution? List the different evidences in support of evolution.

A number of passengers were severely burnt beyond recognition during a train accident. Name and describe a modern technique that can help hand over the dead to their relatives.

Name the particular technique whose steps are shown in the following figure. Use the figure to summarise the technique in three steps:

Study the population growth curves shown above.

1. Identify curves ‘a’ and ‘b’.
2. Mention the responsible for the curves ‘a’ and ‘b’ respectively.
3. Give the necessary equation for the curve ‘b’.

What are selectable markers? Give examples.

Answer the following questions:
How are pea seeds different from castor seeds with respect to endosperm?