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What are chromosomes? Explain how in sexually reproducing organisms the number of chromosomes in the progeny is maintained
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|
0
|
17728
|
March 19, 2018
|
|
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
|
|
0
|
8096
|
March 19, 2018
|
|
List in tabular form, two distinguishing features between the acquired traits and the inherited traits with one example of each
|
|
0
|
3371
|
March 19, 2018
|
|
What is speciation? List four factors responsible for speciation
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0
|
8326
|
March 19, 2018
|
|
Why is variation beneficial to the species but not necessary for the individual?
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|
0
|
5936
|
March 19, 2018
|
|
How do variations occur in an offspring?
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|
0
|
5559
|
March 19, 2018
|
|
‘Different species use different strategies to determine sex of a newborn individual
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0
|
6550
|
March 19, 2018
|
|
“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
|
10547
|
March 19, 2018
|
|
What is DNA copying? State its importance
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|
0
|
21161
|
March 19, 2018
|
|
How many pairs of chromosomes are present in human beings?
|
|
0
|
1070
|
March 19, 2018
|
|
List two differences in tabular form between dominant trait and recessive traits
|
|
0
|
8599
|
March 19, 2018
|
|
A change in DNA that is useful for one property to start with, can become useful later for a different function. Explain
|
|
0
|
3825
|
March 19, 2018
|
|
All the human races like Africans, Asians, Europeans, Americans and others might have evolved from a common ancestor
|
|
0
|
759
|
March 19, 2018
|
|
Does the occurrence of diversity of animals on earth suggest their diverse ancestry also? Discuss this point in the light of evolution
|
|
0
|
655
|
March 19, 2018
|
|
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
|
628
|
March 19, 2018
|
|
How does use and disuse of an organ help in evolution of a new species?
|
|
0
|
1416
|
March 19, 2018
|
|
Do genetic combination of mothers play a significant role in determining the sex of a new born?
|
|
0
|
709
|
March 19, 2018
|
|
What is the contribution of Mendel to genetics?
|
|
0
|
689
|
March 19, 2018
|
|
Give the pair of contrasting traits of the following characters in pea plant and mention which is dominant and recessive
|
|
0
|
779
|
March 19, 2018
|
|
What are the causes of variations?
|
|
0
|
654
|
March 19, 2018
|
|
Why offsprings differ from parents in certain characters?
|
|
0
|
3741
|
March 19, 2018
|
|
Give reasons for the appearance of new combinations of characters in the $F_{2}$ progeny
|
|
0
|
600
|
September 23, 2016
|
|
Give the basic features of the mechanism of inheritance
|
|
0
|
6624
|
September 23, 2016
|
|
All the human races like Africans, Asians, Europeans, Americans
|
|
1
|
1513
|
September 23, 2016
|
|
Bacteria have a simpler body plan when compared with human beings
|
|
1
|
2382
|
September 23, 2016
|
|
Does geographical isolation of individuals of a species lead to formation of a new species?
|
|
1
|
3901
|
September 23, 2016
|
|
A woman has only daughters. Analyse the situation genetically and provide a suitable explanation
|
|
0
|
2569
|
September 23, 2016
|
|
Why did Mendel choose pea plant for his experiments?
|
|
0
|
6920
|
September 23, 2016
|
|
Give the pair of contrasting traits of the following characters in pea plant and mention which is dominant and recessive :
|
|
1
|
2650
|
September 23, 2016
|
|
Does the occurrence of diversity of animals on earth suggest their diverse ancestry also ? Discuss this point in the light of evolution
|
|
0
|
3433
|
September 23, 2016
|