What are chromosomes? Explain how in sexually reproducing organisms the number of chromosomes in the progeny is maintained
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0
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17744
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March 19, 2018
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In one of his experiments with pea plants Mendel observed that when a pure tall pea plant is crossed with a pure dwarf pea plant, in the first generation
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0
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8104
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March 19, 2018
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List in tabular form, two distinguishing features between the acquired traits and the inherited traits with one example of each
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0
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3385
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March 19, 2018
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What is speciation? List four factors responsible for speciation
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0
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8333
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March 19, 2018
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Why is variation beneficial to the species but not necessary for the individual?
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0
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5945
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March 19, 2018
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How do variations occur in an offspring?
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0
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5567
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March 19, 2018
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‘Different species use different strategies to determine sex of a newborn individual
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0
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6561
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March 19, 2018
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“We cannot pass on to our progeny the experiences and qualifications earned during our life time”. Justify the statement giving reason and examples
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0
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10569
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March 19, 2018
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What is DNA copying? State its importance
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0
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21169
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March 19, 2018
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How many pairs of chromosomes are present in human beings?
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0
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1074
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March 19, 2018
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List two differences in tabular form between dominant trait and recessive traits
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0
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8612
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March 19, 2018
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A change in DNA that is useful for one property to start with, can become useful later for a different function. Explain
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0
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3841
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March 19, 2018
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All the human races like Africans, Asians, Europeans, Americans and others might have evolved from a common ancestor
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0
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762
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March 19, 2018
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Does the occurrence of diversity of animals on earth suggest their diverse ancestry also? Discuss this point in the light of evolution
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0
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658
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March 19, 2018
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A very small population of a species faces a greater threat of extinction than a larger population. Provide a suitable genetic explanation.?
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0
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635
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March 19, 2018
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How does use and disuse of an organ help in evolution of a new species?
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0
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1420
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March 19, 2018
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Do genetic combination of mothers play a significant role in determining the sex of a new born?
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0
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716
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March 19, 2018
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What is the contribution of Mendel to genetics?
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0
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696
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March 19, 2018
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Give the pair of contrasting traits of the following characters in pea plant and mention which is dominant and recessive
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0
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783
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March 19, 2018
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What are the causes of variations?
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0
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662
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March 19, 2018
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Why offsprings differ from parents in certain characters?
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0
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3755
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March 19, 2018
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Give reasons for the appearance of new combinations of characters in the $F_{2}$ progeny
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0
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606
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September 23, 2016
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Give the basic features of the mechanism of inheritance
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0
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6629
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September 23, 2016
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All the human races like Africans, Asians, Europeans, Americans
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1
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1518
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September 23, 2016
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Bacteria have a simpler body plan when compared with human beings
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1
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2390
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September 23, 2016
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Does geographical isolation of individuals of a species lead to formation of a new species?
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1
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3905
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September 23, 2016
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A woman has only daughters. Analyse the situation genetically and provide a suitable explanation
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0
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2572
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September 23, 2016
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Why did Mendel choose pea plant for his experiments?
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0
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6927
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September 23, 2016
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Give the pair of contrasting traits of the following characters in pea plant and mention which is dominant and recessive :
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1
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2653
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September 23, 2016
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Does the occurrence of diversity of animals on earth suggest their diverse ancestry also ? Discuss this point in the light of evolution
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0
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3436
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September 23, 2016
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