Usually the recessive character is expressed only when present in double recessive condition. Ho...

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Usually the recessive character is expressed only when present in double recessive condition.
However, single recessive gene can express itself in human beings when the.gene present on
(a) any autosomes
(b) the X-chromosome of the female
(c) the X-chromosome of the male
(d) either can autosome or
X-chromosome
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