|
Explain a monohybrid cross taking seed coat colour as a trait in Pisum Sativum. Work out the cross upto generation
|
|
1
|
3427
|
August 29, 2016
|
|
Describe the mechanism of pattern of inheritance of ABO blood groups in humans
|
|
0
|
3757
|
August 29, 2016
|
|
Mendel published his work on inheritance of characters in 1865, but it remained unrecognized till 1900
|
|
1
|
3726
|
August 29, 2016
|
|
During his studies on genes in Drosophila that were sex-linked T.H.Morgan found population phenotypic ratios deviated from expected 9:3:3:1.Explain
|
|
0
|
1181
|
August 29, 2016
|
|
In pea plants let symbol Y
|
|
1
|
1678
|
August 29, 2016
|
|
How are dominance, codominance and incomplete dominance patterns of inheritance different from each other?
|
|
0
|
4045
|
August 29, 2016
|
|
In a cross between a true-breeding red-flowered and a true-breeding white-flowered snapdragon plant, the plants produced pink flowers.Name and explain
|
|
0
|
4951
|
August 29, 2016
|
|
Why is human ABO blood group gene considered a good example of multiple alleles?
|
|
1
|
3675
|
August 29, 2016
|
|
In pea plants, the colour of the flower is either violet or white, whereas human skin colour shows many gradations.Explain giving reasons how it is possible
|
|
0
|
4459
|
August 29, 2016
|
|
A cross between a normal couple resulted in a son who was haemophilic and a normal daughter
|
|
1
|
1518
|
August 29, 2016
|
|
Write the conclusions Mendel arrived at on dominance of traits on the basis of monohybrid crosses that he carried out in pea plants
|
|
1
|
4258
|
August 29, 2016
|
|
How does a test-cross help in identifying the genotype of the organism? Explain
|
|
0
|
3350
|
August 29, 2016
|
|
Tallness of pea plants is a dominant trait, while dwarfness is the alternate recessive trait.When a pure-line tall is crossed with pure-line dwarf,what fraction of tall plants
|
|
0
|
2475
|
August 29, 2016
|
|
With the help of one example, explain the phenomena of co-dominance and multiple allelism in human population
|
|
0
|
2758
|
August 29, 2016
|
|
A cross was carried out between two pea plants showing the contrasting traits of height of the plant
|
|
1
|
3187
|
August 29, 2016
|
|
In a cross between two tall pea plants,some of the offsprings produced were dwarf.Show with the help of the Punnett Square how this is possible
|
|
0
|
3903
|
August 29, 2016
|
|
Differentiate between multiple allelism and pleiotropy with the help of an example each
|
|
0
|
10875
|
August 29, 2016
|
|
Study the figures given below and answer the question
|
|
1
|
2573
|
August 29, 2016
|
|
Explain pleiotropy with the help of an example
|
|
0
|
4378
|
August 29, 2016
|
|
A cross between a red flower-bearing plant and a white flower-bearing plant of Antirrhinum produced all plants having pink flowers.Work out a cross to explain how this is possible
|
|
0
|
3263
|
August 29, 2016
|
|
Linkage or crossing-over of genes are alternatives of each other.Justify with the help of an example
|
|
0
|
2231
|
August 29, 2016
|
|
Why is pedigree analysis done in the study of human genetics? State the conclusions that can be drawn from it
|
|
0
|
2810
|
August 29, 2016
|
|
Write the scientific name of the fruit-fly. Why did Morgan prefer to work with fruit-flies for his experiments? State any three reasons
|
|
0
|
3138
|
August 29, 2016
|
|
How does the gene 'I' control ABO blood groups in humans? Write the effect the gene has on the structure of red blood cells
|
|
0
|
1765
|
August 29, 2016
|
|
Pea flowers produce assured seed sets.Give a reason
|
|
0
|
2315
|
August 29, 2016
|
|
Name the event during cell division cycle that result in the gain or loss of chromosome
|
|
0
|
2915
|
August 29, 2016
|
|
Mention two contrasting flower-related traits studied by Mendel in his pea plant experiments
|
|
0
|
3282
|
August 29, 2016
|
|
In a dihybrid cross,when would the proportion of parental gene combinations be much higher than non-parental types,as experimentally shown by Morgan and his group?
|
|
0
|
4194
|
August 29, 2016
|
|
Write the percentage of the pea plants that would be heterozygous tall in generation when tall heterzygous pea plants are selfed
|
|
0
|
466
|
August 29, 2016
|
|
Write the percentage of the pea plants that would be homozygous recessive in generation when tall heterozygous pea plants are selfed
|
|
0
|
481
|
August 29, 2016
|