How has mutation breeding helped in improving the production of

Subject

Biology

Class

CBSE Class 12

Pre Boards

Practice to excel and get familiar with the paper pattern and the type of questions. Check you answers with answer keys provided.

Sample Papers

Download the PDF Sample Papers Free for off line practice and view the Solutions online.
Advertisement

 Multiple Choice QuestionsShort Answer Type

1.

A geneticist interested in studying variations and patterns of inheritance in living beings prefers to choose organisms for experiments with shorter life cycle. Provide a reason.

1550 Views

2.

Name the transcriptionally active region of chromatin in a nucleus.

760 Views

3.

State a reason for the increased population of dark coloured moths coinciding with the loss of lichens (on tree barks) during industrialization period in England.

646 Views

4.

Indiscriminate diagnostic practices using X-rays etc., should be avoided. Give one reason.

844 Views

Advertisement
5.

What is Biopiracy?

943 Views

6.

After a brief medical examination a healthy couple came to know that both of them are unable to produce functional gametes and should look for an ‘ART’ (Assisted Reproductive Technique). Name the ‘ART’ and the procedure involved that you can suggest to them to help them bear a child.

1206 Views

7.

Differentiate between male and female heterogamety.

1298 Views

Advertisement

8.

How has mutation breeding helped in improving the production of mung bean crop ?


Mutational breeding was used to introduce resistance to yellow mosaic virus and powdery mildew in the mung bean crop thus improving the production of the crop. Chemicals and radiation were used to induce mutations in the mung bean crop and the plants with the desirable qualities like resistance to virus were selected.

1079 Views

Advertisement
Advertisement
9.

Mention a product of human welfare obtained with the help of each one of the following microbes:

 (a) LAB

 (b) Saccharomyces cerevisiae

 (c) Propionibacterium sharmanii

 (d) Aspergillus niger

922 Views

10.

Many fresh water animals cannot survive in marine environment. Explain.

623 Views

Advertisement