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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.
संबंधित प्रश्न
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.
Short Answer Question.
Explain the chromosomal theory of inheritance.
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
If the haploid number in a cell is 18. The double monosomic and trisomic number will be
When two different genes came from the same parent they tend to remain together.
Write the observed phenotypic ratio.
If you cross dominant genotype PV/PV male Drosophila with double recessive female and obtain F1 hybrid. Now you cross F1 male with double recessive female.
What is the possible genotype in the F2 generation?
Telocentric chromosome differs from acrocentric chromosome in that ____________.
Read the following statements regarding 'X and Y' chromosomes and select the correct option.
P - Due to presence of large amount of euchrornatin X chromosome is genetically more active.
Q - Due to presence of small amount of heterochromatin Y chromosome is genetically more active.
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.
Which of the following does NOT agree with chrotnosomal theory of inheritance?
Extranuclear inheritance is a consequence of presence of genes in ______.
Chromosomal theory of inheritance was given by ______.
Chromosome maps/genetic maps were first prepared by ______.
Which of the following statements indicates parallelism in genes and chromosomes?
- They occur in pairs.
- They segregate during gamete formation.
- They show linkage.
- Independent pairs segregate independently.
What are minisatellites?
During mitosis, chromosomes distribution to the daughter cell is ______.
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
A haemophilic man marries a carrier woman and they have a daughter. What is the probability of their daughter being haemophilic?
In diploid organisms, how many chromosomes from each homologous pair does each gamete receive during meiosis?
According to the Chromosomal Theory of Inheritance, what is the source of one chromosome in each homologous pair of diploid organisms?
The Chromosomal Theory of Inheritance is also known by which alternative name?
