Which disease results from the genetic inability to synthesize a single enzyme ?
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A child is bom with an extra chromosome in each of its cells. This is usually the result of
Exhibition of superiority by a hybrid over both of its parents is called
The chromosomal theroy of heredity implies that
The nuclear membrane completely disappears during
How many meiosis will be required to produce 102 pollen-grains ?
The science dealing with study of inheritance and variation is
The condition in which only one allele of a pair is present is known as
The scientists who rediscovered the Mendel's laws are
Base substitutions from base analogues I are called
A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
Linked genes may be separated by the process of
The best method to determine whether an individual is homozygous or heterozygous is
Among the following which is a test cross?
A codon is a sequence of 3 nucleolides on
In the Operon concept, the regulator gene regulates chemical reactions in the cell by
Which one of the following chemical characteristics is not common to all living beings ?
If an individual does not breed true for its characters, it is called
Mutations which are not dominant are not lost by a gene pooL This is known as
The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
A chemical mutagen is
The genetic constitution of an organism is known as
DNA duplication occurs in
Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
A colour-blind man marries the daughter of a colour-blind person. In their progeny
Chromosomes exhibit minimum coiling during
Down's syndrome is an example of
A functional unit of a gene which specifies synthesis of one poly-peptide is known as
In humans, an example of sex-linked trait is
An offspring of two homozygous parents different from one another by alleles at only one gene locus…
In a monohybrid cross the Fi ratio of a backcross is
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