Question

Give and explain of gene responsible for multiple phenotypic expression? What are such gene called.

Answer 1

Pleiotropic gene refers to a gene that plays role in expression of more than one phenotypic traits. Some of these are called major effects while others are considered minor effects.

At molecular level, we can say that the product formed by this gene plays role in different pathways associated with expression of different traits.

e. g : Gene responsible for sickle cell anaemia is also responsible for excessive sweating, short stature,

Answer 2

Pleiotropic genes

Explanation:

• Pleiotropic genes are the genes that influence two or more unrelated phenotypic traits.
• The pleiotropy occurs when one gene code and control the expression or phenotype of different and unrelated traits.
• This may lead to diseases as genes controlling many traits at once. For example, phenylketonuria.

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