Q381
Open questionAccording to Wilson and Stevens (1902-1905), the X and Y chromosomes are named as
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Biology GK · all questionsGentics and Evoloution
Gentics and Evoloution
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517
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Q382
Open questionWhen new plants are introduced into a locality with different climate then, their adjustment with the changed climate is known as
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Q383
Open questionThe first life on the earth was developed through
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Q384
Open questionTransfer of genetic information from one generation to the next generation is by
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Q385
Open questionMendel selected pea plant for his experiment because
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Q386
Open questionThe complex organic compounds that may have first evolved in the direction of origin of life on earth may have been
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Q387
Open questionThe conclusions of de Vries from his experiments with Oenothera lamarckiana include:
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Q388
Open questionAccording to Stadler, the genes from different strains are not exactly alike, because they result in distributions of the pigment which are known as
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Q389
Open questionConsider the following statements regarding the embryological evidences from Acacia moniteformis for evolution and choose the correct answer:
1. The petiole is modified into a leaf like structure called phyllode
2. In the seedling stage the plant possesses true compound leaves but with the advance of age the phyllodes make their appearance in place of the leaves
3. The true leaves are present
4. Fertilization takes place inside the ovule
1. The petiole is modified into a leaf like structure called phyllode
2. In the seedling stage the plant possesses true compound leaves but with the advance of age the phyllodes make their appearance in place of the leaves
3. The true leaves are present
4. Fertilization takes place inside the ovule
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Q390
Open questionAccording to Neo-Darwinism, in a population, the relative frequencies of the genes will remain constant from one generation to the next if
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Q391
Open questionWho among the following were the chief advocates of the theory of catastrophism?
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Q392
Open questionThe difficulty of introducing foreign DNA into significantly large number of recipient cells was overcome through gene transfer by
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Q393
Open questionHow is free oxygen present into the earth's atmosphere, whereas there was no free oxygen at the time of origin of life?
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Q394
Open questionWhen one gene pair hides the effect of the other unit, the phenomenon is referred to as
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Q395
Open questionChange in basic sequence of Gene is known as
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Q396
Open questionThe widely accepted big-bang hypothesis proposes that the present array of distant galaxies was preceded by a relatively small very dense central mass called 'yelm' which is composed of
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Q397
Open questionSpontaneous mutations which occur in somatic cells are called
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Q398
Open questionThe phenomenon by which a fragment of bacterial DNA is transported to a recipient cell being included within the capsid of the phage infecting the donor cell is known as
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Q399
Open questionWhich chromosomal combination is responsible for maleness in man?
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Q400
Open questionConsider the following statements
1. Homologous organs are common origin with different functions.
2. Analogous organs are different origin but perform similar function in different organisms.
3. Vestigial organs are non-functional and rudimentary organs in an organism which are fully developed and functional in phylogenetically related organisms.
Which of the statements given above is/are correct?
1. Homologous organs are common origin with different functions.
2. Analogous organs are different origin but perform similar function in different organisms.
3. Vestigial organs are non-functional and rudimentary organs in an organism which are fully developed and functional in phylogenetically related organisms.
Which of the statements given above is/are correct?
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