Answers

2016-02-28T15:22:12+05:30
The characteristics of an organisms are determined by internal factors which occur in pairs. Only one of a pair of such factors can be present in a single gamete.

hope this satisfy you.......



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2016-02-28T15:30:39+05:30
When two alternative forms of a trait or character (genes) are present in an organism only one factor expresses itself in F1 progeny.
i.e , the dominant one.
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Hope it helped mark as brainliest ^_^