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Genetics And Ev...

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  • Question 1
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    Which of the following pairs of traits were not selected by Mendel for his hybridisation experiments on pea plants?

  • Question 2
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    Which of the following statements about dihybrid cross, involving yellow round seeded plant and green wrinkled seeded plants, is incorrect?

  • Question 3
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    Which of the following statements about sickle cell anemia is incorrect?

  • Question 4
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    Which of the following statements about genetic disease is true?

  • Question 5
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    In the given pedigree, which of the following is the Mendelian disorder?

  • Question 6
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    Henking (1891) could trace a specific nuclear structure all through spermatogenesis in a few insects, and it was also observed by him that 50 per cent of the sperm received this structure after spermatogenesis, whereas the other 50 percent sperm did not receive it. Which of the following name was given to this structure by him?

  • Question 7
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    T.H Morgan hybridised yellow-bodied, white-eyed females drosophila to brown-bodied, red-eyed males and intercrossed their F1 progeny. Which of the following represents the percentage of recombinants and parental type in F2?

  • Question 8
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    Which of the following types of disorder is transferred from a phenotypically normal, but carrier female to only some of the male progeny?

  • Question 9
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    The condition of a karyotype 2n + 1, 2n - 1, 2n + 2 and 2n - 2 is called ___________.

  • Question 10
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    A person having genotype IA IB, represents the the blood group as AB. Which of the following explains this?

  • Question 11
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    Which of the following groups of organisms show Z Z/ZW type of sex determination?

  • Question 12
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    Occasionally, a single gene may express more than one effect. The phenomenon is called pleiotropy. Which of the following is an example of pleiotropy?

  • Question 13
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    Mother and father of a person with 'O' blood group have 'A' blood group. What would be the genotype of both mother and father?

  • Question 14
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    In peas, tallness is dominant over dwarfness and violet colour of flowers is dominant over the white colour. When a tall plant bearing violet flowers was pollinated with a dwarf plant bearing white flowers, the different phenotypic groups were obtained in the progeny as given below.
    Tall, Violet = 136 Tall, White = 134 Dwarf, Violet = 136 Dwarf, White = 132. __________ is the genotypes of the two parents.

  • Question 15
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    A diploid organism is heterozygous for 3 loci, how many types of gametes can be produced?

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