Question

chromosomal mutations
crossing over
duplication
and
deletion
how does gene duplication allow new genes to develop over many generations? select two answer choices.
a if the original gene becomes non - functional because of a mutation, it will be selected against, and could be deleted because it accumulates further mutations over time to eventually become a non - functional gene
b if the duplicated gene becomes non - functional because of a mutation, it will not be selected against and could accumulate further mutations over time to eventually become a gene with new functions.
c in organisms with duplicated genes, the original gene and function is deleted while allowing mutations to occur in the duplicated gene that can lead to new variations
d in organisms with duplicated genes, the original gene and function is maintained while allowing mutations to occur in the duplicated gene that can lead to new variations

Explanation:

Gene duplication allows for new gene development as the original gene's function can be maintained while the duplicated gene undergoes mutations. If the duplicated gene becomes non - functional due to mutation, it may not be selected against and can accumulate further mutations to gain new functions.

Answer:

B. If the duplicated gene becomes non - functional because of a mutation, it will not be selected against and could accumulate further mutations over time to eventually become a gene with new functions.
D. In organisms with duplicated genes, the original gene and function is maintained while allowing mutations to occur in the duplicated gene that can lead to new variations.