Question

List two reasons for the appearence of variations among the progeny formed by sexual reproduction ?......
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Answer 1

HOLA GYZZ!!

the genetic material is exchanged between chromosomes before forming zygote. DNA exchange in chromosome.

appearance of variations among progeny because...

-one gemete from male EX :sperm

-one gemete from female EX:Ovum

-union of two different gemetes .