In humans, an example of sex-linked trait is
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The science dealing with study of inheritance and variation is
The number of characters investigated by Mendel was
Which disease results from the genetic inability to synthesize a single enzyme ?
DNA duplication occurs in
If an individual does not breed true for its characters, it is called
The nuclear membrane completely disappears during
A chemical mutagen is
The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
Transfer of a gene or genes through a virus is called
The term 'meiosis' was coined bv
Colour blindness is caused due to
Which one of the following chemical characteristics is not common to all living beings ?
When is the sex of an offspring decided
Exhibition of superiority by a hybrid over both of its parents is called
How many meiosis will be required to produce 102 pollen-grains ?
Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
Linked genes may be separated by the process of
Among the following which is a test cross?
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
A giant chromosome having many chromo-nemata lying side by side all along their length is called
A colour-blind man marries the daughter of a colour-blind person. In their progeny
Down's syndrome is an example of
Reverse transcription was discovered by
An offspring of two homozygous parents different from one another by alleles at only one gene locus…
The scientists who rediscovered the Mendel's laws are
Albinism in com plants is best described as
In a monohybrid cross the Fi ratio of a backcross is
The condition in which only one allele of a pair is present is known as
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