how can we say that a child has 2 versions of a trait
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A child has two versions of every traits because both the father and the mother contribute practically equal amount of genetic material to the child. This mean that each traits can be influenced by both paternal maternal DNA.
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aravindak2k3:
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Answer:The two versions of a trait are brought in by the male and female gametes situated on copies of the same chromosome. During fertilization one of the chromosomes comes from the father through the male gamete and the other chromosome comes from the mother through the female gamete.
Explanation:
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