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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, both chromosomes and genes segregate and assort 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
What is gene pool?
Briefly mention the contribution of T. H. Morgan in genetics.
Explain the types of chromosomes on the basis of position of centromere.
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.
An allohexaploidy contains
Genes G S L H are located on the same chromosome. The recombination percentage is between L and G is 15%, S and L is 50%, H and S are 20%. The correct order of genes is
Changing the codon AGC to AGA represents
Codon – anticodon interactions occur by
Write the salient features of the Sutton and Boveri concept.
Match the column I (Type of chromosome) with column II (name of chromosome).
| Type of chromosome | Name of chromosome | ||
| i. |  |
P. | Acrocentric |
| ii. |  |
Q. | Telocentric |
| iii. |  |
R. | Metacentric |
| iv. |  |
S. | Sub-metacentric |
Which of the following is a primary constriction?
From the following identify the statements that are CORRECT with respect to homologous and non-homologous region of X and Y chromosomes.
i. Non-homologous region of X chromosome is longer and contains more genes than that of non-homologous region of Y chromosome.
ii. X-linked genes are present on nonhomologous region of X-chromosome.
iii. Y-linked genes are present on homologous region of Y-chromosome.
iv. Crossing over occurs only between homologous regions of X and Y chromosomes.
Chromosomal theory of inheritance was put forth by ______
Which of the following does NOT agree with chrotnosomal theory of inheritance?
Extra nuclear chromosomes occur in ______.
Extranuclear inheritance is a consequence of presence of genes in ______.
Two or more independent genes present on different chromosomes which determine nearly same phenotype are called ______.
Experimental verification of ‘chromosomal theory of inheritance’ was done by ______.
How many types of gametes would be produced if the genotype of a parent is AaBB?
A couple has two daughters. What is the probability that the third child will also be a female?
Who postulated the 'Chromosomal theory of inheritance'?
Genes located on same locus but having different expressions are:
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
Consider the following information and answer the question that follows:
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Make a single pedigree chart using the above information to show the pattern of inheritance of phenylketonuria (PKU) in the family of Reshma.
Which chromosome in the human genome has the highest number of genes?
