When one member of a pair of allelic genes express itself as a whole, it is a case of

Dominance

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Co-dominance

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Incomplete dominance

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None of the above

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Solution

The correct option is D Dominance
The law of dominance states that an organism with alternate forms of a gene will express the form that is dominant.

Suggest Corrections

	I		II
(a)	Dominance	(i)	Many genes govern a single character
(b)	Codominance	(ii)	In a heterozygous organism only one allele expresses itself
(c)	Pleiotropy	(iii)	In a heterozygous organism both alleles express themselves fully
(d)	Polygenic inheritance	(iv)	A single gene influences many characters.