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How Genetic disorders arises ? Explain b...

How Genetic disorders arises ? Explain by giving suitable examples.

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Each and every feature in any organism is controlled by one or the other gene located on the DNA present in the chromosome.
= DNA is the carrier of genetic information.
= It is hence transmitted from one generation to the other without any change or alteration.
= However changes or alteration do take place occasionally.
= Such an alteration or change in the genetic material is referred to as mutation.
= A number of disorders in human beings have been found to be associated with the inheritance of changed or altered genes or chromosomes.
= These are disorders or illness caused by one or more abnormalities in autosomes or sex chromosomes of the person.
= Thus, referred to as a autosomal disorders or sex-linked disorder respectively.
= The genetic disorder can be divided as.
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KUMAR PRAKASHAN-PRINCIPLES OF INHERITANCE AND VARIATION -SECTION -F (MULTIPLE CHOICE QUESTIONS (MCQS)) (MCQs ASKED IN COMPETITIVE EXAM)
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  2. The incorrect statement with regard to haemophilia is

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  3. Which Mendelian idea is depicted by a cross in which the F1-generation...

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  4. If both parents are carriers for thalassaemia, which is an autosomal r...

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  5. If two persons with .AB. blood group marry and have sufficiently large...

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  6. Which of the following statements is not true of two genes that show 5...

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  7. Fruit colour in squash is an example of

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  8. A human female with Tunner,s syndrome :-

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  9. A man whose father was colour blind marries a woman, who had a colour ...

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  10. what is pleiotropic gene ?

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  11. In his classic experiments on pea plants, Mendel did not use

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  12. A colourblind man marries a woman with normal sight who has no history...

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  13. In the following human pedigree, the filled symbols represent the affe...

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  14. The term "linkage" was coined by

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  15. A gene showing codominance has

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  16. The mechanism that causes a gene to move from one linkage group to ano...

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  17. what is true breeding line?

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  18. If a colourblind man marries a woman who is homozygous for normal colo...

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  19. A tall true breeding garden pea plant is crossed with a dwarf true bre...

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  20. Pick out the correct statements. I. Haemophilia is a sex-linked rece...

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  21. In a test cross involving F1 dihybrid flies, more parental-type offspr...

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