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Principles of Inheritance and Variation

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Biology

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Biology

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CBSE Gujarat Board Haryana Board

Previous Year Papers

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Class 10 Class 12

Which one of the following statements about the particular entity is true?

  • Centromere is found in animal cell which produces ester during cell divison

  • the gene for producing insulin is present in every body cell

  • Nucleosome is formed of nucleotides

  • DNA consists of a core of eight histones


C.

Nucleosome is formed of nucleotides

A scientist has analysed the human DNA sequence present in a human -mouse somatic cell hybrid line possessing a translocation involving human chromosome-II and X. This data indicates that the human insulin gene is located on the short arm of chromosome-II in everybody cell but is not expressed in all cells.

A scientist has analysed the human DNA sequence present in a human -mouse somatic cell hybrid line possessing a translocation involving human chromosome-II and X. This data indicates that the human insulin gene is located on the short arm of chromosome-II in everybody cell but is not expressed in all cells.

314 Views . 12 Shares

Name the plant that shows incomplete dominance in respect of the colour of its flower.

The plany which shoes incomplete dominace in respect of the colour of its flower is -

Snapdragron ( Antirrhinum majus)

Or 

Mirabilis jalapa (Four-O- Clock plant ).
1012 Views . 11 Shares

What for symbols AA and Aa stand ?

AA : Homozygous dominant, Aa : Heterozygous dominant.
772 Views . 11 Shares

Mention the phenomenon of pleiotropy by giving an example.

Pleiotropy. When one gene controls more than one phenotypic character it is termed as pleiotropy.

Example : Sickle cell anaemia.

825 Views . 7 Shares

Name one trait that does not blend.

Sex trait .
1181 Views . 4 Shares

Give one example of genetic trait for each of the following in humans : (i) Lethality (ii) Multiple allelism.

(i) Lethality : Sickle cell anaemia.

(ii) Multiple allelism : ABO blood groups.

815 Views . 5 Shares

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