Reproduction in organisms — BIOLOGY STD 12 Science — Question

Differentiate between multiple allelism and pleiotropy with the help of an example of each.

Give the binomials of two types of yeast and the commercial bioactive products they help to produce.

pairs of contrasting characters of:

1. Position of flowers.
2. Colours of pod.
3. Shape of pod.
4. Colour of seed, that were selected in pea plant by Mendel.

How have transgenic animals proved to be beneficial in:

1. Production of biological products.
2. Chemical safety testing.

What is a vaccine? How do they act to provide long term immunity to an individual, who is vaccinated?
OR
Write the events that take place when a vaccine for any disease is introduced into the human body.

OR
How does a vaccine for a particular disease immunise the human body against that disease?

OR
Name and explain the type of immunity that is provided by injecting microbes deliberately during immunisation into the human body.

Define parthenocarpy.

Give the applications of DNA fingerprinting technique.

How does genetic diversity affect sustenance of a species?

Some organisms suspend their metabolic activities to survive in unfavourable conditions. Explain with the help of any four examples.