Chromosome and its structure - class-XI
Description: chromosome and its structure | |
Number of Questions: 86 | |
Created by: Priya Bakshi | |
Tags: cell structure cell theory, cell specialization, and cell replacement chromosomal aberration in humans nucleus and chromosome structure of chromosome, cell cycle and cell division heredity and variation life processes in living organisms- part 1 cell - the structure and functions cell: the unit of life biology cell and cell organelles the mitotic cell cycle botany |
During cell division, spindle fibers attach to which part of chromosomes?
Bead like thickened portions of leptotene chromosomes are
Most of the DNA of living beings is present in the
Apart from sex chromosome, which is the other type of chromosome?
.......... gives chromosome its characteristic shape.
By which chromosomes are made of?
Chromosomes contain information for inheritance of features from parents to next generation in the form of
Chromosome carry .......... which helps in the inheritance or transfer of characters from the parents to the offspring.
The sex chromosomes of plants were first discovered in
Eukaryotic chromosomes always exist
The structure present over chromosome
In man the normal number of
chromosomes is
Chromatid is
The nuclear component that contains genes which are responsible for heredity or transfer of characteristics from parents to children is/are
Choose the correct statement.
Chemical composition of chromosome :
How many sets are represented in the species with 156 chromosomes ?
Chromosome have an ability of?
Study of _________ helps in the determination of phylogeny and taxonomy.
Who proposed that chromosomes carried a different set of heritable elements?
Who hypothesised that individuals of the same species have the same number of chromosomes?
Sometimes a few chromosomes have non staining secondary constriction at a constant location. This gives the appearance of a small fragment, called :
Which of the following statements is incorrect?
What would be the number of chromosomes of the aleurone cells of a plant with $42$ chromosomes in its root tip cells?
Chromosome consists of
The first person to observe chromosome was
Chromosomes are composed of
The non-sticky chromosomal ends are known as
Chromonemata are embedded in a
Bead like structure found on chromosome are called as
Exceptionally, large chromosome is
A thread like structure in the nucleus of a cell formed of DNA which carries the genes is
Nucleus contains ________ which are rod shaped structures.
Which chromosomes are called as supernumerary?
Who used the word "chromosome"
Swellings present over the chromosomes are
Kinetochore is
Telomeres
A constriction on the chromosome is
Satellite means
Which one is present on chromosome?
Sister chromatids are joined at
A duplicated chromosome has how many chromatids
Kinetochore is
Which statement is not correct
The term chromosome was coined by
Term chromosome was coined by
Chromosome theory of inheritance was proposed by
More than $200$ chromosomes occur in
Chromosomes were first seen by
In a chromosome the protein content is?
Kinetochore is?
Is chromosome are the chromosomes with _____________.
Somatic chromosome number is 40.What shall be chromosome number in the cells seminiferous tubule ?
Separate identical copies of chromosomes are formed at the _______________.
A pericentric inversion in chromosome involves _______________.
Is chromosomes are formed by.
Lamp brush chromosomes found in certain organisms are directly related to metamorphosis. Which one of the following statements in this regard is incorrect?
$6$p $23$ in chromosome nomenclature indicates band number.
Diagrammatic representations of a chromosome is known as ____________.
Match List I(Chromosome aberrations) with List II(consequences) and select the correct a answer using the codes given the lists.
List-I | List-II |
---|---|
a. Intercalary deficiency | $1$. chromosome ring formation at metaphase |
b. Duplication | $2$. Bridge and fragment formation |
c. Para centric inversion | $3$. Change in gene order |
d. Translocation | $4$. Two breaks followed by reunion and deletion |
Is chromosome refers to the ______________________.
How are chromatin, chromatid and chromosomes related to each other?
Choose the correct answer from the alternatives given:
In which part of the cell is DNA concentrated?
Choose the correct answers from the alternatives given :
The thread like structures that begin to radiate from each centromere by the end of prophase are
Choose the correct answers from the alternatives given :
The centromere or primary constriction of the chromosome contains rings of protein that are intimately associated with a spindle fibre. These rings are called
Which is not a major function of the genetic material?
Select the correct option:
Mark the correct option w.r.t. chromosomes.
which of the following is typically not found in normal somatic cells of human male?
Which of the following dyes is best suited for staining chromosomes ?
Which of the following does not occur during condensation of chromosomes?
Structure which provide shape to chromosome is called as
Part of chromosome after secondary constriction is called as
General length of chromosome is
The chromosome that lacks a centromere is called as
The largest normal metaphasic chromosome has a size of
During staining, chromosomes get stained with
The term chromonema was coined by
Chromosome end is called
Parascaris possesses chromosome
Read the given statements
(i) Centromere is present in the middle of the chromosome and forms two equal arms.
(ii) Chromosome has a terminal centromere
(iii) Centromere lies close to the end of the chromosome forming one extremely short and one very long arm
(iv) Centremere lies slightly away from the middle of the chromosome resulting into one shorter arm and one longer arm.
Select the correct option as per the codes given above-
When stained with a certain dye, the chromosomes show alternate light and dark bands known as Q-bands under the microscope. Name the dye.
Synaptinemal complex was first described by
Match column I with column II and select the correct option from the given codes
Sr.no | List I | Sr.no | List II |
---|---|---|---|
a. | V-shaped at anaphase | 1. | Acrocentric chromosome |
b. | L-shaped at anaphase | 2. | Metacentric chromosome |
c. | J-shaped at anaphase | 3. | Telocentric chromosome |
d. | I- shaped at anaphase | 4. | Sub-metacentric chromosome |
.