science
Grade-10
Easy

Question

Which among the following is a recessive trait in pea plants?

  1. Violet flowers

  2. Axial flowers

  3. Inflated pods

  4. None of the above

     

hintHint:

The homozygous  genotype of this trait is PP.

The correct answer is:

None of the above


    • Mendel, the father of Genetics, developed the law of inheritance
    • The traits he considered for explaining heredity are due to the expression of genes
    • An experiment was conducted on garden peas (Pisum sativum)
    • 7 different phenotypes or physical appearances were discussed
    • A cross was made between a dominant and a recessive plant
    • The dominant and recessive plants showed contrasting phenotypes which are as follows:
    Character Dominant Recessive
    Seed shape Smooth Wrinkled
    Seed color Yellow Green
    Flower color Purple White
    Pod shape Inflated Constricted
    Pod color Green Yellow
    Flower position Axial Terminal
    Stem length Tall Dwarf

    • The homozygous trait for violet flower is PP and for white flower is pp
    • A cross between these two flowers produced Pp which is heterozygous
    • The hybrid formed exhibited dominant allele purple color, which will mask the recessive allele expression

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