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प्रश्न
Who had proposed the chromosomal theory of inheritance?
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उत्तर
Sutton and Boveri independently proposed the chromosomal theory of inheritance in 1902. The two workers found a distinctive connection between the transmission of Mendelian hereditary elements (genes) and chromosome activity during gamete production and fertilisation. They proposed that chromosomes carried Mendelian factors. During meiosis, the chromosome, not the genes, segregates and assorts independently before recombining in the zygote during fertilisation. Morgan, Sturtevant, and Bridges enlarged upon the chromosomal theory of inheritance.
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संबंधित प्रश्न
Sketch and label the structure of chromosome.
How many chromosomes do drones of honey bees possess?
State the difference between meiocyte and gamete with respect to chromosome number.
Describe the structure of chromosomes with a suitable diagram.
Classify the chromosomes on the basis of position of centromere.
Describe the structure of sex-chromosomes.
Write the salient features of the Sutton and Boveri concept.
Mention the name of man-made cereal. How it is formed?
Which of the following is a primary constriction?
From the following identify the INCORRECT statement/s with respect to the chromosomes.
i. Chromosomes are capable of self replication and play vital role in heredity, mutation, variation, and evolutionary development of eukaryotic species.
ii. Chromosomes are visible during cell division.
iii. Chemically eukaryotic chromosomes are made of mRNA, histone and non-histone proteins.
iv. The number of chromosomes varies within the population of a particular species.
Identify the term that represents the degree of repetition of the primary basic number of chromosomes in a cell.
Which of the following does NOT agree with chrotnosomal theory of inheritance?
A plant having the genotype AABbCC will produce ______ kinds of gametes.
Extranuclear inheritance occurs in ______.
Extra nuclear chromosomes occur in ______.
Extranuclear inheritance is a consequence of presence of genes in ______.
Mendel’s work was rediscovered by three scientists in the year ______.
Chromosomal theory of inheritance was given by ______.
Experimental verification of ‘chromosomal theory of inheritance’ was done by ______.
What are minisatellites?
During mitosis, chromosomes distribution to the daughter cell is ______.
What do you mean by locus?
Who postulated the 'Chromosomal theory of inheritance'?
Experimental verification of the chromosomal theory of inheritance was done by ______.
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
Which of the following is sex chromosomal disorder?
In a karyotype analysis, X and Y chromosomes represent sex chromosomes.
Name the scientist who discovered the X chromosome.
