A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea plant If the plant is selfed, the genotype in the Fi generation is most likely to be
all tall
50% tall and 50% dwarf
all dwarf
data insufficient
Correct Answer :
D. data insufficient
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
A person meets with an accident and great loss of blood has occurred. There is no time to analyse his blood group. It is safe to transfuse blood of
How many meiosis will be required to produce 102 pollen-grains ?
25
25.6
26
26.5
A child is bom with an extra chromosome in each of its cells. This is usually the result of
nondisjunction
crossing over
segregation
hybridization
A codon is a sequence of 3 nucleolides on
t-RNA
m-RNA
s-RNA
hn-RNA
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 best method to determine whether an individual is homozygous or heterozygous is
inbreeding
cross-breeding
back-crossing
self-fertilization
Klinefelter's syndrome is developed when the chromosome in male is
XXY
XXXY
XXYY
All of these
A chemical mutagen is
X-rays
UV-rays
-rays
5-Bromo-Uracil
Transfer of a gene or genes through a virus is called
transformation
transduction
genetic engineering
sex-duction
Reverse transcription was discovered by
Watson
Crick
Temin
Porter
The term 'meiosis' was coined bv
Herting and Van Beneden
Sutton and Boveri
Hofmeister and Waldeyer
Farmer and Moore
Base substitutions from base analogues I are called
transitions
transversions
intragenic complimentation
intergenic complimentation
The nuclear membrane completely disappears during
late prophase
early metaphase
metaphase
interphase
The science dealing with study of inheritance and variation is
Genetics
Evolution
Morphology
Cytology
The number of characters investigated by Mendel was
four
seven
six
one
When is the sex of an offspring decided
At ovulation
During meiosis
During cleavage
At fertilization
Chromosomes exhibit minimum coiling during
prophase
metaphase
interphase
telophase
An offspring of two homozygous parents different from one another by alleles at only one gene locus is known as
monohybrid
dihybrid
trihybrid
backcross
Crossing over in meiosis occurs in
leptotene
pachytene
diplotene
diakinesis
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
A functional unit of a gene which specifies synthesis of one poly-peptide is known as
clone
recon
cistron
codon
Among the following which is a test cross?
TtxTt
TTxTT
TTxTt
Ttxtt
The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
all heterozygous tall
two tall and two dwarf
one homozygous tall, two heterozygous tall and one homozygous dwarf
all homozygous dwarf.
In humans, an example of sex-linked trait is
Curly hair
Sickle-cell anaemia
Colour-blindness
Down's syndrome
The genetic constitution of an organism is known as
Genome
Genepool
Genotype
Phenotype
Linkage is
directly related to crossing over
same as translocation
inversely related to crossing over
opposite to segregation
The first person to induce mutations was
Hugo de Vries
T.H. Morgan
Sturtevant
H.J. Muller
Linked genes may be separated by the process of
gene mutation
segregation
crossing over
polyploidy
In the Operon concept, the regulator gene regulates chemical reactions in the cell by
inhibiting transcription of m-RNA
inactivating enzymes in the reaction
inhibiting the substrate in the reaction
inhibiting the migration of m-RNA into cytoplasm