Advertisements
Advertisements
Question
Who had proposed the chromosomal theory of inheritance?
Advertisements
Solution
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.
APPEARS IN
RELATED QUESTIONS
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
What is gene pool?
Sketch and label the structure of chromosome.
State the difference between meiocyte and gamete with respect to chromosome number.
Briefly mention the contribution of T. H. Morgan in genetics.
Distinguish between X andY chromosomes. (Mention any 'two' points.)
Name the type of cell division involved in the production of sperms by honey bees.
Distinguish between X and Y chromosomes.
Define the Homologous chromosomes
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
Write the salient features of the Sutton and Boveri concept.
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?
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 |
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.
At secondary constriction I, ______ becomes organized during interphase.
A plant having the genotype AABbCC will produce ______ kinds of gametes.
A gene pair hides the effect of another. The phenomenon is ______.
In a certain taxon of insects some have 17 chromosomes and the others have 18 chromosomes. The 17 and 18 chromosome-bearing organisms are ______.
Mendel’s work was rediscovered by three scientists in the year ______.
Experimental verification of ‘chromosomal theory of inheritance’ was done by ______.
What are minisatellites?
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?
Consider the following information and answer the question that follows:
|
Make a single pedigree chart using the above information to show the pattern of inheritance of phenylketonuria (PKU) in the family of Reshma.
