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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 centromere is situated in the middle of the chromosome, it is called ________.
(a) Metacentric
(b) Acrocentric
(c) Submetacentric
(d) Telocentric
Briefly mention the contribution of T.H. Morgan in genetics.
Distinguish between X and Y chromosomes.
Choose the correct options of the following question:
Study the given monohybrid cross:
A test cross for this Fj will be:
Define the Homologous chromosomes
The A and B genes are 10 cm apart on a chromosome. If an AB/ab heterozygote is test crossed to ab/ab, how many of each progeny class would you expect out of 100 total progeny?
If the haploid number in a cell is 18. The double monosomic and trisomic number will be
Changing the codon AGC to AGA represents
Mention the name of man-made cereal. How it is formed?
Telocentric chromosome differs from acrocentric chromosome in that ____________.
Which of the following is a primary constriction?
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 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.
Which three scientists independently rediscovered Mendel’s work?
Chromosomal theory of inheritance was given by ______.
What would be the genotype of the parents if the offspring have the phenotypes in 1:1 proportion?
How do genes and chromosomes share similarity from the point of view of genetical studies?
A haemophilic man marries a carrier woman and they have a daughter. What is the probability of their daughter being haemophilic?
In a karyotype analysis, X and Y chromosomes represent sex chromosomes.
Name the scientist who discovered the X chromosome.
