The number of chromosomes in a certain type of cell division is halved. This kind of cell division occurs in 

• Only testis

• Only ovary

• Both ovary and testis

• All body cells

In a homozygous plant round seeds (R) are dominant over wrinkled seeds(r) 

What is the number of chromosomes in the gametes of human beings?

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The cross between two parents having one pair of contrasting characters

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The cross involvi

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The process of uptake of mineral ions against the concentration gradient using energy from cell.