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Allelism refers to...

Allelism refers to

A

Genic interactions controlling a character

B

Multiple genes controlling a character

C

Expression of many characters by a single gene

D

Alternative forms of a gene at a give locus

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The correct Answer is:
d
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Which one of them is the correct statement w.r.t a gene and an allele? a) There is one allele for a given gene which is located at a single loci in the homologous chromosome. b) An allele is the unit of DNA responsible for the appearance and inheritance of a character. c) An allele refers to section of DNA that controls certain traits, e.g., blood group type. d) None of these.

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Alleles are:

MODERN PUBLICATION-PRINCIPLES OF INHERITANCE AND VARIATION-COMPETITION FILE (OBJECTIVE TYPE QUESTIONS (A. MULTIPLE CHOICE QUESTIONS (MCQs):)
  1. The loss of a chromosmal segment is due to :

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  2. XO type of sex determination is seen in

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  3. Allelism refers to

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  4. Mendelian principles are not applicable in case of

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  5. Genotypic and phenotypic ratio in monohybrid cross remains the same in...

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  6. Mendel was successful in discovering the principles of inheritance as

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  7. Crossing over is the exchange of genetic material between:

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  8. A hereditary disease which is never passed on from father to son is

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  9. If a colour blind man marries a girl who is normal (homozygous) for th...

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  10. Frequency of crossing over will be relatively more if :

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  11. The existence within a population of non-beneficial alleles in heteroz...

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  12. Presence of recombinants is due to :

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  13. Genes for cytoplasmic male sterility in plants are located in

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  14. How many types of genetically different gametes will be produced by a ...

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  15. Two allelic genes are located on

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  16. A test cross is carried out to

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  17. The idea of mutations was brought forth by

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  18. Among the seven pairs of contrasting traits in pea plant as studied by...

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  19. Crick one of the discoverer of DNA double helical stucture, was the ma...

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  20. Some of the dominant traits studied by Mendel were

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