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
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Colour blindness is caused due to
Exhibition of superiority by a hybrid over both of its parents is called
A chemical mutagen is
Among the following which is a test cross?
The best method to determine whether an individual is homozygous or heterozygous is
The chromosomal theroy of heredity implies that
A codon is a sequence of 3 nucleolides on
Base substitutions from base analogues I are called
Diakinesis is characterised by
An offspring of two homozygous parents different from one another by alleles at only one gene locus…
The segment of DNA which participates in crossing over is known as
How many meiosis will be required to produce 102 pollen-grains ?
Which one of the following chemical characteristics is not common to all living beings ?
Klinefelter's syndrome is developed when the chromosome in male is
Which disease results from the genetic inability to synthesize a single enzyme ?
The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
Crossing over in meiosis occurs in
The first person to induce mutations was
The condition in which only one allele of a pair is present is known as
A colour-blind man marries the daughter of a colour-blind person. In their progeny
A functional unit of a gene which specifies synthesis of one poly-peptide is known as
Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
Linked genes may be separated by the process of
A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
DNA duplication occurs in
Down's syndrome is an example of
A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
In the Operon concept, the regulator gene regulates chemical reactions in the cell by
The number of characters investigated by Mendel was
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