NEET Biology - Chromosomes
Exam Duration: 60 Mins Total Questions : 30
Who coined the term chromosome for the first time?
- (a)
Waldeyer
- (b)
Du Praw
- (c)
Bon Baer
- (d)
se Vries
Salivary gland chromosomes are also known as
- (a)
polytene chromosomes
- (b)
L-chromosomes
- (c)
lampbrush chromosomes
- (d)
autosomes
Who discovered salivary gland chromosomes?
- (a)
Balbiani
- (b)
Waldeyer
- (c)
Du Praw
- (d)
Porter
Puffs of polytene chromosomes are also known as
- (a)
Balbiani rings
- (b)
bands
- (c)
chiasmata
- (d)
None of these
Chromosomes were first seen by
- (a)
Hofmeister
- (b)
Waldeyer
- (c)
Strasburger
- (d)
Flrmming
Chromatid is
- (a)
One-half of chromosome
- (b)
haploid chromosome
- (c)
complete chromosome
- (d)
duplicate chromosome
Centromere is that part of chromosome where
- (a)
nucleoli are formed
- (b)
crossing over takes place
- (c)
chromatids are attached
- (d)
hicking occurs
A chromosome with sub-terminal centromere is
- (a)
acentric
- (b)
acrocentric
- (c)
metacentric
- (d)
telocentric
For karyotyping, the cells can be taken from
- (a)
white blood cells
- (b)
amniotic cells
- (c)
bone marrow
- (d)
All of these
The length of the polytene chromosome can be upto
- (a)
1000\(\mu\)
- (b)
1200\(\mu\)
- (c)
1500\(\mu\)
- (d)
None of these
The organs of dipterans from where polytene chromosomes have been reported
- (a)
gut epithelium
- (b)
Malpighian
- (c)
fat bodies
- (d)
All of these
The lampbrush chromosomes are seen during which stage of meiotic division
- (a)
diplotene stage
- (b)
metaphase
- (c)
anaphase
- (d)
None of these
A row of dense granules present in Lampbrush chromosomes is known as
- (a)
chromomeres
- (b)
centromere
- (c)
chiasmata
- (d)
loops
Chromosomes were first seen as nuclear filaments in pollen mother cells of
- (a)
Tradescantia
- (b)
Mango
- (c)
Cycas
- (d)
Pinus
Idio chromosomes is the name given to
- (a)
allosome
- (b)
sex-chromosomes
- (c)
Both (a) and (b)
- (d)
secondary constriction
Non-stainable region of a chromosome is known as
- (a)
centromere
- (b)
primary constriction
- (c)
Both (a) and (b)
- (d)
secondary construction
Human beings share banding pattern of chromosomes with
- (a)
milch animals
- (b)
domesticated animals
- (c)
primates
- (d)
carnivorous mammals
Chromosomes which determine the sex of an individuals are called
- (a)
autosomes
- (b)
lysosomes
- (c)
heterosomes
- (d)
peroxysomes
In plants maximum number of chromosomes (2n = 1262) are found in
- (a)
Ophioglossum reticulatum
- (b)
Haplopappus gracillus
- (c)
Saccharum officinarum
- (d)
None of the above
Autosome is
- (a)
achromatic chromosome
- (b)
idiosome
- (c)
a chromosomes other than sex-chromosomes
- (d)
allosome
An angiospermic plant with minimum number of chromosomes is
- (a)
Haplopappus gracilis
- (b)
Ophiologissum reticulatum
- (c)
Asparagus ramosus
- (d)
Pisum sativum
Polytene chromosomes are
- (a)
unistranded
- (b)
bistranded
- (c)
multistranded
- (d)
None of these
Telomeres prevents the attachment of one chromosomes to
- (a)
other chromosomes
- (b)
nuclear envelope
- (c)
nucleolus
- (d)
All of these
Telomere repetitive DNA sequence control the function of eukaryotic chromosome, because they
- (a)
act as replicans
- (b)
are RNA transcription factor
- (c)
help chromosome pairing
- (d)
prevent chromosome loss
B-chromosome is also known as
- (a)
somatic chromosome
- (b)
mega chromosome
- (c)
limited chromosome
- (d)
supernumerary chromosome
When centromere is present at one end, the chromosome is
- (a)
metacentric
- (b)
acrocentric
- (c)
telocentric
- (d)
apocentric
When the chromosome has a centromere nearer to one end of the chromosome resulting into one shorter and one longer arm, the chromosome is termed as
- (a)
metacentric
- (b)
submetacentric
- (c)
acrocentric
- (d)
telocentric
Puffs are considered as
- (a)
active genes
- (b)
inactive genes
- (c)
regulatory genes
- (d)
promotory genes
Balbiani rings of polytene chromosomes are the site of
- (a)
RNA synthesis
- (b)
DNA synthesis
- (c)
DNA replication
- (d)
protein synthesis
The arrangements of chromosomes in the order of their decreasing lengths is known as
- (a)
idiogram
- (b)
karyotype
- (c)
karyogram
- (d)
abnormal karyotype