Any single feature or quantifiable measurement governed by genes of an organism.

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Solution

A trait may be any single feature or quantifiable measurement of an organism. However, the most useful traits, for genetic analysis are present in different forms in different individuals. A visible trait is the final product of many molecular and biochemical process.

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	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.

	Column I		Column II
(1)	Dominance	(i)	Many genes govern a single character
(2)	Codominance	(ii)	In a heterozygous organism only one allele expresses itself
(3)	Pleiotropy	(iii)	In a heterozygous organism both alleles express themselves fully
(4)	Polygenic inheritence	(iv)	A single genes influences many characters

\begin{matrix} C o l u m n I & C o l u m n I I A . & D o m i n a n c e & (i) & M a n y g e n e s g o v e r n a s i n g l e c h a r a c t e r B . & C o d o m i n a n c e & (i i) & I n a h e t e r o z y g o u s o r g a n i s m o n l y o n e a l l e l e e x p r e s s e s i t s e l f C . & P l e i o t r o p y & (i i i) & I n a h e t e r o z y g o u s o r g a n i s m b o t h a l l e l e s e x p r e s s t h e m s e l v e s f u l l y D . & P o l y g e n i c i n h e r i t a n c e & (i v) & A s i n g l e g e n e i n f l u e n c e s m a n y c h a r a c t e r s \end{matrix}

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