genetics

you can find it in wikipedia..

genetics is the science taht deal with heredity and variation characteristics inherited from parent are heredity trsitd.these are transmitted from parent to ffspring through chromosomes and genes.each human _____ cell nucles has 23 minute bodies called chromosomes.at the time of fertilisation, 23 female chromosomes combimne wih 23 female chromosomes.with the exception of one, all other meterials chromosomes are complemented with a simila-shaped paternal chormosomes.if 23rd paternal chromomes is similar to the 23rd material chromosome the offspring will be female.otherwise male.it is father's chromsomes that determines the ___ of the child.