Chromosomes exhibit minimum coiling during
prophase
metaphase
interphase
telophase
Correct Answer :
C. interphase
Related Questions
A colour-blind man marries the daughter of a colour-blind person. In their progeny
none of her daughters are colour-blind
all her sons are colour-blind
all her daughters are colour-blind
half of her sons are colour-blind
Reverse transcription was discovered by
Watson
Crick
Temin
Porter
A codon is a sequence of 3 nucleolides on
t-RNA
m-RNA
s-RNA
hn-RNA
Linked genes may be separated by the process of
gene mutation
segregation
crossing over
polyploidy
A functional unit of a gene which specifies synthesis of one poly-peptide is known as
clone
recon
cistron
codon
Crossing over in meiosis occurs in
leptotene
pachytene
diplotene
diakinesis
Down's syndrome is an example of
monosomy
trisomy
triploidy
polyploidy
An offspring of two homozygous parents different from one another by alleles at only one gene locus is known as
monohybrid
dihybrid
trihybrid
backcross
Lethal genes are those which
cause the death of the organism in which they are present
cause the death of the homozygous infant being formed
cause the death of heterozygous infant being formed
all of the above
Base substitutions from base analogues I are called
transitions
transversions
intragenic complimentation
intergenic complimentation
When is the sex of an offspring decided
At ovulation
During meiosis
During cleavage
At fertilization
In humans, an example of sex-linked trait is
Curly hair
Sickle-cell anaemia
Colour-blindness
Down's syndrome
Klinefelter's syndrome is developed when the chromosome in male is
XXY
XXXY
XXYY
All of these
Mutations which are not dominant are not lost by a gene pooL This is known as
Survival of the dominant
Survival of the recessive
Hardly-Weinberg law
None of these
The nuclear membrane completely disappears during
late prophase
early metaphase
metaphase
interphase
In a monohybrid cross the Fi ratio of a backcross is
1:1
3:1
1:2:1
9:3:3:3
The best method to determine whether an individual is homozygous or heterozygous is
inbreeding
cross-breeding
back-crossing
self-fertilization
DNA duplication occurs in
meiosis only
meiosis II and mitosis
mitosis only
meiosis I and mitosis
The segment of DNA which participates in crossing over is known as
recon
muton
criston
replicon
Linkage is
directly related to crossing over
same as translocation
inversely related to crossing over
opposite to segregation
When two genes are situated very close to each other in a chromosome
the percentage of crossing over between themis high
hardly any cross-overs detected
no crossing-over can ever take place between them
only double cross overs can take place between them.
The first person to induce mutations was
Hugo de Vries
T.H. Morgan
Sturtevant
H.J. Muller
Transfer of a gene or genes through a virus is called
transformation
transduction
genetic engineering
sex-duction
Dyad is
a pair of homologous chromosomes
a pair of non-homologous chromosomes
a pair of sister chromosomes
a pair of non-sister chromosomes
Which one of the following chemical characteristics is not common to all living beings ?
Similar triplet codes for amino acids
Energy is stored by high energy rich phosphate bonds
Types of protein present in the body.
Ribosomes act at sites of protein synthesis
The chromosomal theroy of heredity implies that
chromosomes are composed of DNA and protein
genes are composed of chromosomes
organism cannot live withoutchromosomes
genes are located on the chromosomes and are transmitted to the next generation through them.
The scientists who rediscovered the Mendel's laws are
Mast and Pantin
Watson and Crick
Corren, Tschermark and Hugo de Vries
Khorana and Nirenberg
The number of characters investigated by Mendel was
four
seven
six
one
Chromosomes exhibit minimum coiling during
prophase
metaphase
interphase
telophase
The science dealing with study of inheritance and variation is
Genetics
Evolution
Morphology
Cytology