Traditional Breeding
Trending Questions
Q.
Which of the following types of pollination lead to genetic variation?
Both B and C
Xenogamy
Geitonogamy
Autogamy
Q.
Briefly describe various steps involved in plant breeding.
Q. What do you understand by out cross?
Q. A farmer crosses the progeny of a cattle that produces superior progeny, for several generations so as to obtain higher yield. Will he be successful in his attempt? If not, how will he solve this problem? [3]
Q. Assertion [A]: DNA/transgenic technology is more advantageous than traditional cross breeding techniques.
Reason [R]: It is difficult to identify precise genes which improves plant quality in traditional breeding techniques.
Reason [R]: It is difficult to identify precise genes which improves plant quality in traditional breeding techniques.
- Both A and R are true and R explains A
- Both A and R are true but R does not explain A
- A is true and R is false
- A is true and R is false
Q. What are the limitations of cross breeding among selected parents in plant breeding programmes?
Q. Assertion [A]: DNA/transgenic technology is more advantageous than traditional cross breeding techniques.
Reason [R]: It is difficult to identify precise genes which improve plant quality in traditional breeding techniques.
Reason [R]: It is difficult to identify precise genes which improve plant quality in traditional breeding techniques.
- Both A and R are true and R explains A
- Both A and R are true but R does not explain A
- A is true and R is false
- A is true and R is false
Q. Assertion [A]: DNA/transgenic technology is more advantageous than traditional cross breeding techniques.
Reason [R]: It is difficult to identify precise genes which improve plant quality in traditional breeding techniques.
Reason [R]: It is difficult to identify precise genes which improve plant quality in traditional breeding techniques.
- Both A and R are true and R explains A
- Both A and R are true but R does not explain A
- A is true and R is false
- A is true and R is false
Q. Genetically modified crops can be produced by ___________.
- Recombinant DNA technology
- Somatic hybridisation
- Cross breeding
- Micropropagation
Q. Dolly sheep cloned by Dr. Ian Wilmut was genetically identical to
- The sheep which donated haploid nucleus
- The donor sheep which donated diploid nucleus
- The sheep which donated the egg cell
- The surrogate mother
Q.
why does geitonogamy leads to inbreeding depression?
Q. Which of the following is true for traditional cross breeding of crops?
- Slow
- Expensive
- Harmful to environment
- Random mutations
Q. Repeated self pollination over the generations produces.
- Better progeny
- Elimination of weak traits
- New varieties
- Weak progeny
Q. Which of the following is true for traditional cross breeding of crops?
- Slow
- Expensive
- Harmful to environment
- Random mutations
Q. Transgenic plants take longer to develop when compared to plants being improved using traditional breeding
- True
- False
Q. Transgenic plants take longer to develop when compared to plants being improved using traditional breeding
- True
- False
Q.
Briefly describe various steps involved in plant breeding.
Q. What is the significance or advantage of outcrossing?
Q. The earliest record of point mutation is
- White eyed male Drosophila by Morgan
- Short legged sheep by Seth Wright
- Autotrophic mutants of Neurospora by Beadle and Tatum
- Mutants of Escherichia coli discovered by Joshua Lederberg
Q. Assertion [A]: DNA/transgenic technology is more advantageous than traditional cross breeding techniques.
Reason [R]: It is difficult to identify precise genes which improves plant quality in traditional breeding techniques.
Reason [R]: It is difficult to identify precise genes which improves plant quality in traditional breeding techniques.
- Both A and R are true and R explains A
- Both A and R are true but R does not explain A
- A is true and R is false
- A is true and R is false
Q. In maize, hybrid vigor is exploited by
- Harvesting seeds from the most productive plants
- Inducing mutations
- Bombarding the protoplast with DNA
- Crossing of two inbreed parental lines