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A human being suffering from Down's Synd...

A human being suffering from Down's Syndrome shows trisomy of `21^(st)` chromosome. Mention the cause of this chromosomal abnormality.

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The cause of this genetic disorder is the presence of an additional copy of the chromosome number 21 trisomy of 21) due to nondisjunction.
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TRUEMAN BIOLOGY-GENETICS AND EVOLUTION -SECTION-D
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  2. Give reason for - (i) Both strands of DNA are not copied during tran...

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  3. Name the type of mutation that causes sickle cell anemia.

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  4. One chromosome contains one molecule of DNA. In eukaryotes the length ...

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  5. With the advent of DNA technology tool is available to identify a crim...

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  6. Name the scientists responsible for determining the biochemical nature...

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  7. Define transcription. Where does transcription in eukaryotes takes pla...

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  8. Define: Evolution Gene pool

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  9. Two blood samples A and B picked up from the crime scene were handed o...

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  10. Name the scientist who proved DNA as a hereditary material.

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  11. With the help of one example each provide genetic explanation for the ...

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  12. Name any two chromosomal disorders.

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  13. Name any two mendelian disorder.

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  14. Define Fossil. Mention its types.

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  15. (a) State the central dogma in molecular biology. Who proposed it? Is ...

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  16. (a) Write what DNA replication refers to. (b ) List any three enzym...

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  17. Explain inheritance of flower colour in Mirabilis jalapa. Mention the ...

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  18. A child suffering from Thalassemia is born to a normal couple. But the...

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  19. Explain the mechanism of sex-determination in humans. b) Differentia...

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  20. Explain Mendel's law of independent assortment by taking a suitable ex...

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  21. Name the species evolved post Industrialization in England.

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