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Heredity and Ev...

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  • Question 1
    1 / -0

    Any heritable feature is a:

  • Question 2
    1 / -0

    How many X chromosomes are present in a male?

  • Question 3
    1 / -0

    Heredity is seen in ______

  • Question 4
    1 / -0

    A cross between two tall garden pea plants produced all tall plants. The possible genotypes of the parents are
    I) TT, TT
    II) TT, Tt
    III) Tt, tt
    IV) Tt, Tt

  • Question 5
    1 / -0

    Read the two incidents given below.
    Incident 1: A species of moth is preyed on by bats. Over hundreds of years, the moths develop a sophisticated pattern of flying when they hear the screech of a bat and which helps them escape danger. Other changes occur as well, when current moth mates with its ancestor moth, no viable eggs are produced. 
    Incident 2: A species of frogs is living in a pond near an earthquake fault line. An earthquake separates the frog population into two separate populations. After hundreds of years, the two population are not able to mate.

    Based on the second incident, mating between two groups of frogs is not possible as they have now become different:

  • Question 6
    1 / -0

    The heart of mammals and birds is four-chambered, while fishes have two-chambered hearts and amphibians and reptiles have three-chambered hearts. The hearts of birds and mammals are:

  • Question 7
    1 / -0

    What is true about the genotypes of offsprings produced as a result of cross between a pea plant with genotype YY that produces yellow seeds and a pea plant with genotype yy that produces green seeds?

  • Question 8
    1 / -0

    In his theory of natural selection, Charles Darwin suggested "survival of fittest" as basis of organic evolution. The correct explanation for "survival of fittest" is

  • Question 9
    1 / -0

    The Punnett square below shows a cross between a pure tall and heterozygous tall plant. What will be the percentage of tall offspring?


     GameteT  T
    T TTTT 
     tTt Tt 

  • Question 10
    1 / -0

    Trait that masks the other trait is called _______ trait.

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