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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

Which one of the following is the most suitable, medium for culture of Drosophila melanogaster?

• Agar agar

• Ripe banana

• Cow dung

C.

Ripe banana

Drosophila melanogaster is commonly called as fruitfly and is often used in genetic and developmental biology researchers. The ripe banana is the most suitable medium for the culture of this fly.
Moist bread is a culture medium for the fungus Rhizopus while agar-agar is used as a tissue culture medium.

Drosophila melanogaster is commonly called as fruitfly and is often used in genetic and developmental biology researchers. The ripe banana is the most suitable medium for the culture of this fly.
Moist bread is a culture medium for the fungus Rhizopus while agar-agar is used as a tissue culture medium.

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 ).

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.

What for symbols AA and Aa stand ?

AA : Homozygous dominant, Aa : Heterozygous dominant.

Name one trait that does not blend.

Sex trait .

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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