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Name the event during cell division that...

Name the event during cell division that results in the gain or loss of chromosome.

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Non-disjunction
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What is the cause of cell division ?

The decision for cell division is taken

(i) List the chromosomal disorders a human may suffer from if karyotype analysis of the individual shows 47 chromosomes instead of normal 46 (ii) Explain the cause that results in the gain of chromosome number. (iii) Mention the symptoms of any one the disorders an individual can suffer from

[A] : The first meiotic division is known as reduction division . [R] : The first division in meiosis results in reduced number (half) of chromosomes .

[A]: The first meiotic division is known as heterotypic division. [R]: The first division in meiosis results in reduced number of chromosomes.

[A]: Meiotic division in meiosis results in reduced number of chromosomes. [R]: Synapses occurs during zygotene of meiosis.

Which is called direct cell division ?

TRUEMAN BIOLOGY-GENETICS AND EVOLUTION -SECTION-D
  1. Name the event during cell division that results in the gain or loss o...

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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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