Among the following which is a test cross?
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When two genes are situated very close to each other in a chromosome
The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
A functional unit of a gene which specifies synthesis of one poly-peptide is known as
Which one of the following chemical characteristics is not common to all living beings ?
How many meiosis will be required to produce 102 pollen-grains ?
The segment of DNA which participates in crossing over is known as
A child is bom with an extra chromosome in each of its cells. This is usually the result of
A chemical mutagen is
Exhibition of superiority by a hybrid over both of its parents is called
Albinism in com plants is best described as
Colour blindness is caused due to
Chromosomes exhibit minimum coiling during
The scientists who rediscovered the Mendel's laws are
Klinefelter's syndrome is developed when the chromosome in male is
The term 'meiosis' was coined bv
An offspring of two homozygous parents different from one another by alleles at only one gene locus…
The chromosomal theroy of heredity implies that
Which disease results from the genetic inability to synthesize a single enzyme ?
The condition in which only one allele of a pair is present is known as
The science dealing with study of inheritance and variation is
Diakinesis is characterised by
In humans, an example of sex-linked trait is
The number of characters investigated by Mendel was
A giant chromosome having many chromo-nemata lying side by side all along their length is called
The best method to determine whether an individual is homozygous or heterozygous is
Mutations which are not dominant are not lost by a gene pooL This is known as
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