Duplication is a chromosomal mutation in which part of the chromosome breaks off and is incorporated into its a) homologous chromosome.
b) parent chromosome.
c) nonhomologous chromosome.
d) base pair.

homologous chromosome

Explanation:

an extra copy is made after a duplication mutation

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humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.