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प्रश्न
Mention the name of man-made cereal. How it is formed?
उत्तर
Triticale, the successful first man-made cereal. Depending on the ploidy level Triticale can be divided into three main groups:
- Tetraploidy: Crosses between diploid wheat and rye.
- Hexaploidy: Crosses between tetraploid wheat Triticum durum (macaroni wheat) and rye.
- Octoploidy: Crosses between hexaploid wheat T. aestivum (bread wheat) and rye. Hexaploidy Triticale hybrid plants.
संबंधित प्रश्न
What is gene pool?
Sketch and label the structure of chromosome.
Briefly mention the contribution of T.H. Morgan in genetics.
Distinguish between X andY chromosomes. (Mention any 'two' points.)
Choose the correct options of the following question:
Study the given monohybrid cross:
A test cross for this Fj will be:
Give an account of artificial chromosomes in the transfer of genetic material.
Answer the following question.
Compare in any three ways the chromosomal theory of inheritance as proposed by Sutton and Bovery with that of experimental results on pea plant presented by Mendel.
Explain codominance in colour coat in cattle with checker board method.
During cell division, spindle fibres get attached to the disc shaped structures present on the centromere are known as ______.
Which of the following does NOT agree with chrotnosomal theory of inheritance?
In a certain taxon of insects some have 17 chromosomes and the others have 18 chromosomes. The 17 and 18 chromosome-bearing organisms are ______.
Which three scientists independently rediscovered Mendel’s work?
What would be the genotype of the parents if the offspring have the phenotypes in 1:1 proportion?
During mitosis, chromosomes distribution to the daughter cell is ______.
What do you mean by locus?
Which of the following phase follows S and G2 phases of interphase?
Who postulated the 'Chromosomal theory of inheritance'?
Discuss in detail the contributions of Morgan and Sturvant in the area of genetics.
Which of the following sentences are correct?
1. The offspring exhibit only parental combinations due to incomplete linkage
2. The linked genes exhibit some crossing over in complete linkage
3. The separation of two linked genes are possible in incomplete linkage
4. Crossing over is absent in complete linkage
