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Genes which code for a pair of contrasti...

Genes which code for a pair of contrasting traits are known as

A

dominant genes

B

alleles

C

linked genes

D

none of these

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The correct Answer is:
B
Genes are the units of inheritance and contain the information that is required to express a particular trait in an organism. Alternating form if a single gene which code for pair of contrasting traits are known as alleles, i.e, tall and drawf are alleles determining the height of pea plant.
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NCERT FINGERTIPS-PRINCIPLES OF INHERITANCE & VARIATION-Principles Of Inheritance & Variation
  1. Refer to given table of contrasting traits in pea plants studied by Me...

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  2. Which of the following characters was not chosen by Mendel ?

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  3. Genes which code for a pair of contrasting traits are known as

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  4. A recessive allele is expressed in

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  5. The characters which appear in the first filial generation are called

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  6. What will be the distribution of phenotypic features in the first gene...

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  7. In a monohybrid cross between two heterozygous individuals, percentage...

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  8. On crossing two heterozygous tall plants (Tt), a total of 500 plants w...

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  9. In mice, black coat colour (allele B) is dominant to brown coat colour...

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  10. In fruits flies, long wing is dominant to vestigial wing. When heteroz...

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  11. What is the probility of production of dwarf offsprings in a cross bet...

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  12. A tobacco plant heterozygous for recessive character is self-pollinate...

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  13. Which of the following crosses will give tall and dwarf pea plants in ...

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  14. To determie the genotype of a tall plant of F(2) generation, Mendel ...

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  15. Read the given statements and select the correct option Statement 1 ...

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  16. Which of the following is a test cross ?

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  17. Fruit shape in shephered purse (Capsella bursa) is of two types-triang...

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  18. Mendel formulated the law of of purity of gametes on the basis of

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  19. Read the given statements and select the correct option Statement 1 ...

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  20. The inheritance of flower colour in Antirrhinum (dog flower) is an exa...

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