science
Grade-10
Easy

Question

Mendel used __________ type of pea lines.

  1. False-breeding

  2. True-breeding

  3. Not breeding

  4. Indefinitely breeding

hintHint:

Plants obtained from self pollination.

The correct answer is:

True-breeding


    • True breeding plants are those which are produced after many generations of self-pollination
    • Stable inheritance of a particular trait or character will be observed in such plants
    • Mendel used 14 true breeding varieties of garden peas for his experiment
    • The 14 varieties were identical in 6 phenotypes except for one which was contrasting

    • Self pollinating flowers are produced when pollen fall from anther to the stigma of the same plant
    • The genetic information of the female and male gametes will be same
    • New character will not be produced during self pollination or true breeding
    • Elimination of weaker qualities will not be possible in these plants

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    The idea that different alleles pairs are passed to offspring independently of each other is Mendel's law of:

    • The law of segregation is the basis for independent assortment
    • During meiosis, the number of chromosomes is reduced to half to form haploid gametes
    • The assortment of the chromosomes into gametes occur randomly
    • Following segregation, recombination also occurs during meiosis
    • Combination of paternal and maternal genes can occur and a hybrid is formed

    The idea that different alleles pairs are passed to offspring independently of each other is Mendel's law of:

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    • The law of segregation is the basis for independent assortment
    • During meiosis, the number of chromosomes is reduced to half to form haploid gametes
    • The assortment of the chromosomes into gametes occur randomly
    • Following segregation, recombination also occurs during meiosis
    • Combination of paternal and maternal genes can occur and a hybrid is formed

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    The genotypic ratio of monohybrid cross is?

    • Monohybrid cross is the cross between parents with homozygous genotype of a single trait
    • Genotype of homozygous individuals cane be determined through monohybrid cross
    • The dominant allele can be determined
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    The genotypic ratio of monohybrid cross is?

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    • Monohybrid cross is the cross between parents with homozygous genotype of a single trait
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    Continuous self-pollination in a species may develop?

    • Pollination helps in the reproduction in plants by transfer of pollen grains from anther to stigma
    • Pollination can be classified into 
    1. Self pollination: Pollen grains from anther falls into the stigma of the same flower
    2. Cross pollination: Pollen grains from anther falls into the stigma of a different flower

    Continuous self-pollination in a species may develop?

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    • Pollination helps in the reproduction in plants by transfer of pollen grains from anther to stigma
    • Pollination can be classified into 
    1. Self pollination: Pollen grains from anther falls into the stigma of the same flower
    2. Cross pollination: Pollen grains from anther falls into the stigma of a different flower

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    Which method is used to produce a true-breeding line?  

    • True or pure breeding is possible in self-pollination
    • Elimination of weaker qualities is not possible
    • New variety of offspring cannot be formed in self-pollinating plants

    Which method is used to produce a true-breeding line?  

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    • True or pure breeding is possible in self-pollination
    • Elimination of weaker qualities is not possible
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    The process of the transfer of characters from parents to offspring is referred to as ______

    • The genes are present in chromosomes
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    • Humans have 23 pairs while peas have 7 pairs

    The process of the transfer of characters from parents to offspring is referred to as ______

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    • The genes are present in chromosomes
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    Which is not a pair of contrasting traits studied by Mendel?

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    • The presence of a dominant allele will mask the presence of a recessive allele

    Which is not a pair of contrasting traits studied by Mendel?

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    • Gene is the hereditary unit
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    Mendel’s idea that the pair of alleles of each parent separate and only one allele from each parent is passed to an offspring is explained by:

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      Seed shapeSmoothWrinkled
      Seed colorYellowGreen
      Flower colorPurpleWhite
      Pod shapeInflatedConstricted
      Pod colorGreenYellow
      Flower positionAxialTerminal
      Stem lengthTallDwarf

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      Seed colorYellowGreen
      Flower colorPurpleWhite
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    • Law of inheritance includes:
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