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Barr body in mammals represent...

Barr body in mammals represent

A

All the heterochromatin in male and female cells

B

The Y-chromosome in somatic cells of male

C

All the heterochromatin in female cells

D

One of the two X-chromosomes in somatic cells of females

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The correct Answer is:
D
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AAKASH INSTITUTE-PRINCIPLES OF INHERITANCE AND VARIATION-Assignment (SECTION-C) Previous Years Questions
  1. An abnormal human male phenotype involving an extra Y-chromosome (XYY)...

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  2. The phenomenon, in which an alleles of one gene suppresses the activit...

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  3. Barr body in mammals represent

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  4. Two dominant independently assorting genes react with each other. They...

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  5. A diseased man marries a normal woman.They get three daughters and fiv...

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  6. Person whose father is colourblind marries a lady whose mother is daug...

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  7. In which of the following disease , the man has an extra X-chromosome ...

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  8. H.J. Muller ws awarded Nobel Prize for

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  9. Polygenic genes show :-

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  10. Foetal sex can be determined by examining cells from the amniotic flui...

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  11. A female fruitfly heterozygous for sex linked genes is mated with norm...

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  12. Genetic identity of a human male is determined by

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  13. Different forms of a gene located at the same locus of chromosomes a...

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  14. After crossing two plants, the progenies are found to be male sterile....

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  15. Albinism is known to be due to an autosomal recessive mutation. The fi...

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

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  17. When a single gene influences more then one trait it is called

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  18. Mental retardation in man, associated with sex chromosomal abnormality...

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  19. Loss of an X-chromosome in a particular cell, during its development, ...

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  20. If Mandel had studied 7 traits using a plant with 12 chromosomes inste...

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