Epistasis implies

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4.Principles of Inheritance and Variation

normal

Epistasis implies

One pair of genes can completely mask the expression of another pair of genes

One pair of genes independently controls a particular phenotype

One pair of genes enhances the phenotype expression of another pair of genes

Many genes collectively control a particular phenotype

(AIIMS-1985)

Solution

(a) Epistasis is the phenomenon of masking or supressing the expression of a gene by another non-allelic gene.

The gene which supresses the expression of a non allelic gene is termed as epistatic gene and a gene whose expression is masked by a non allelic gene is termed as hypostatic gene.

Standard 12

Biology

Which one of the following is not a mutagen

normal

The recessive genes located on $X$-chromosome in humans are always

normal

Somaclonal variation appears in

normal

(AIIMS-2005)

In man, albinism is due to non-synthesis of melanin in the absence of

normal

The defect sickle-cell anaemia is caused by the of glutamic acid by valine at the $6^{th}$ position of the globin chain of the haemoglobin molecule.

normal

Epistasis implies

Solution

Similar Questions

Which one of the following is not a mutagen

The recessive genes located on $X$-chromosome in humans are always

Somaclonal variation appears in

In man, albinism is due to non-synthesis of melanin in the absence of

The defect sickle-cell anaemia is caused by the ______ of glutamic acid by valine at the $6^{th}$ position of the ______ globin chain of the haemoglobin molecule.

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The defect sickle-cell anaemia is caused by the of glutamic acid by valine at the $6^{th}$ position of the globin chain of the haemoglobin molecule.