Question
  1. What is mutation breeding?
  2. Why is mutation breeding necessary?
  3. Give an example of disease-resistance developed in plant by this method.

Answer

  1. Mutation breeding is the process of inducing mutations artificially (using chemicals or gamma radiations) and selecting the plants that show.
  2. Mutation breeding is necessary because of the availability of a limited number of diseaseresistance genes in the cultivated crops and their wild relatives
  3. Resistance to powdery mildew and yellow mosaic virus have been developed in mung bean.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Mention the functions of LAB that are useful to man
With the help of any two suitable examples explain the effect of anthropogenic action on organic evolution.
Explain three outbreeding devices.
  1. Define life span.
  2. Mention the life span of:
  1. Crocodile.
  2. Crow.
  3. Parrot and
  4. Butterfly.
  1. What do ‘Y and ‘B’ stand for in ‘YAC’ and ‘BAC’ used in Human Genome Project (HGP)? Mention their role in the project.
  2. Write the percentage of the total human genome that codes for proteins and the percentage of discovered genes whose functions are known as observed during HGP.
  3. Expand ‘SNPs’ identified by scientists in HGP.
Explain the inheritance of hemophilia?
  1. When and where did Neanderthal man live?
  2. What was his brain capacity?
  3. Mention the advancements he showed over Homo erectus.
Discuss the role of women and communities in protection and conservation of forests.
Three water samples namely river water, untreated sewage water and secondary effluent discharged from a sewage treatment plant were subjected to BOD test. The samples were labelled A, B and C but the laboratory attendant did not note which was which. The BOD values of the three samples A, B and C were recorded as 20 mg/L, 8 mg/L and 400 mg/L respectively. Which sample of the water is most polluted? Can you assign the correct label to each assuming the river water is relatively clean?
Water is very essential for life. Write any three features each for plants and animals, which enable them to survive in water scarce environment.