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What are alleles?...

What are alleles?

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The different forms of a gene are called allels.
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What is an allele?

ABO blood grouping is controlled by gene I which has three alleles and show co-dominance. There are six genotypes. How many phenotypes in all are possible?

The gene I that controls the ABO blood grouping in human beings has three alleles IA. IB and i (a) How many different genotypes are Likely to be present in human population? (b) Also, how many phenotypes are possibly present?

(a) What are multiple alleles? Give an example. (b) Write the symptoms of Klinefelter's syndrome.

What are addition reaction? What are catalysts? Illustrate with an example.

What are multiple alleles? Give an example.

What are multiple alleles ? Give an example.

What are multiple alleles ? Why the alleles I^(A) and I^(B) for blood group are considered codominant ?

OSWAAL PUBLICATION-PRINCIPLES OF INHERITANCE AND VARIATIONS -(TOPIC 2 ) (SEX DETERMINATION AND GENETIC DISORDERS (MULTIPLE CHOICE QUESTIONS ))
  1. What are alleles?

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  2. All genes located on the same chromosome :

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  3. Conditions of a karyotype 2n pm 1 and 2n pm 2 are called :

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  4. Distance between the genes and percentage of recombination shows :

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  5. If a genetic disease is transferred from a phenotypically normal but c...

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  6. In sickle cell anaemia glutamic acid is replaced by valine. Which one ...

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  7. Person having genotype I^A IB would show the blood group as AB. This i...

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  8. ZZ/ZW type of sex determination is seen in :

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  9. A Across between two tall plants resulted in offspring having few dwar...

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  10. In a dihybrid cross, if you get 9:3:3:1 ratio it denotes that:

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  11. Which of the following will not result in variations among siblings?

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  12. Mendel's Law of independent assortment holds good for genes situated o...

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  13. Occasionally, a single gene may express more than one effect. The phen...

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  14. In a certain taxon of insects some have 17 chromosomes and the others ...

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  15. The inheritance pattern of a gene over generations among humans is stu...

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  16. It is said that Mendel proposed that the factor controlling any charac...

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  17. Two genes 'A' and 'B' are linked. In a dihybrid cross involving these ...

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  18. In the F2 generation of a Mendelian dihybrid cross the number of pheno...

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  19. Mother and father of a person with 'O' blood group have 'A' and 'B' bl...

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