The fruit fly, Drosophila melanogaster was found to be very suitable for experimental verification of chromosomal theory of inheritance by Morgan and his colleagues because from Biology Principles of Inheritance and Variation Class 12 Nagaland Board
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Principles of Inheritance and Variation

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

The fruit fly, Drosophila melanogaster was found to be very suitable for experimental verification of chromosomal theory of inheritance by Morgan and his colleagues because

  • It reproduces parthenogenetically

  • a single mating produces two young files

  • smaller female is easily recognisable from larger male

  • it completes life cycles life cycle in about two weeks


D.

it completes life cycles life cycle in about two weeks

The fruit fly, Drosophila melanogaster was found to be very suitable for experimental verification of chromosomal theory of inheritance by Morgan and his colleagues because

* It completes its life cycle in a very short period (ie, about two weeks).
* a single mating produces many offsprings.
* larger female is easily recognisable from the smaller male.

The fruit fly, Drosophila melanogaster was found to be very suitable for experimental verification of chromosomal theory of inheritance by Morgan and his colleagues because

* It completes its life cycle in a very short period (ie, about two weeks).
* a single mating produces many offsprings.
* larger female is easily recognisable from the smaller male.

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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.

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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.

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Name one trait that does not blend.

Sex trait .
1181 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 ).
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What for symbols AA and Aa stand ?

AA : Homozygous dominant, Aa : Heterozygous dominant.
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