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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

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Class 10 Class 12

One gene – one enzyme hypothesis was postulated by

  • R. Franklin

  • Hershey and Chase

  • A. Garrod

  • Beadle and Tatum


D.

Beadle and Tatum

'One gene - one enzyme' hypothesis was given by Beadle and Tatum (1948) which states that particular gene controls the synthesis of specific enzyme. Later, it was modified to 'one gene-one polypeptide hypothesis' by Yanofsky et.al. (1965).

'One gene - one enzyme' hypothesis was given by Beadle and Tatum (1948) which states that particular gene controls the synthesis of specific enzyme. Later, it was modified to 'one gene-one polypeptide hypothesis' by Yanofsky et.al. (1965).

421 Views

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

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

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

What for symbols AA and Aa stand ?

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

Name one trait that does not blend.

Sex trait .
1181 Views