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प्रश्न
Write the salient features of the Sutton and Boveri concept.
उत्तर
Salient features of the chromosomal theory of inheritance:
- Somatic cells of organisms are derived from the zygote by repeated cell division (mitosis). These consist of two identical sets of chromosomes. One set is received from a female parent (maternal) and the other from a male parent (paternal). These two chromosomes constitute the homologous pair.
- Chromosomes retain their structural uniqueness and individuality throughout the life cycle of an organism.
- Each chromosome carries specific determiners or Mendelian factors which are now termed as genes.
- The behavior of chromosomes during the gamete formation (meiosis) provides evidence to the fact that genes or factors are located on chromosomes.
संबंधित प्रश्न
If the number of chromosomes in an endosperm cell is 27, what will be the chromosome number in the definitive nucleus?
- 9
- 18
- 27
- 36
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:
Short Answer Question.
Explain the chromosomal theory of inheritance.
When two different genes came from the same parent they tend to remain together.
Write the observed phenotypic ratio.
Which of the following is a primary constriction?
Identify the term that represents the degree of repetition of the primary basic number of chromosomes in a cell.
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?
A plant having the genotype AABbCC will produce ______ kinds of gametes.
Extranuclear inheritance is a consequence of presence of genes in ______.
Chromosomal theory of inheritance was given by ______.
What are minisatellites?
What do you mean by locus?
Who postulated the 'Chromosomal theory of inheritance'?
Genes located on same locus but having different expressions are:
How do genes and chromosomes share similarity from the point of view of genetical studies?
Discuss in detail the contributions of Morgan and Sturvant in the area of genetics.
