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Biology Test 182

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Biology Test 182
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Weekly Quiz Competition
  • Question 1
    4 / -1

    How many types of phenotypes would be produced in F1 progeny in the following cross that obeys Mendel's law of Independent Assortment -

    A A B B C C × a a b b c c

  • Question 2
    4 / -1

    Out of 2000 plants in the F2 generation of a dihybrid plants, how many plants are homozygous for only one character ?

  • Question 3
    4 / -1

    In cross between the pea plants homozygous for Round and Yellow seeds and Wrinkled and Green seeds the ratio between the plants having Round seeds and Wrinkled seeds in F2 generation will be -

  • Question 4
    4 / -1

    If two different alleles of a gene come together, only one is able to express itself this is called :-

  • Question 5
    4 / -1

    About genotype 'Rr' select the incorrect statement :-

  • Question 6
    4 / -1

    Which of the following is the unit of inheritance ?

  • Question 7
    4 / -1

    Which of the following cross will produce only heterozygous progenies ?

  • Question 8
    4 / -1

    Which one of the following is not correct regarding mendelian dihybrid cross ?

  • Question 9
    4 / -1

    In a dihybrid cross in garden pea 1024 plants were obtained in F2 generation. How many plants will show recessive trait for both characters ?

    Solution

    Plants with recessive trait for both character in F2 gen. of a dihybrid cross = 1/16
    In 1024 total plants = 1/16 × 1024 = 64 plants

     

  • Question 10
    4 / -1

    Read the following five statements (A–E) :

    (A) Mendel's approach of using mathemetics to explain biological phenomena was totally new and unacceptable to many of the biologists of his time.
    (B) Pea plant has many contrasting traits.
    (C) Gene which controls more than one character is called as pleiotropic gene.
    (D) Hybrid vigour is develops due to homozygosity.
    (E) Every gene is DNA but every DNA is not gene.

    How many of the above statements are correct?

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