Question

PLEASE HELP:)
1.)Which form of genetic engineering was used by humans for many years before the discovery of DNA?
selective breeding
gene splicing
animal cloning
gene insertion

2.) The nucleus contains DNA. Which statement BEST describes how DNA controls the working of the cell?
It inhibits division of cells.
It codes for proteins.
It regulates traffic in and out of the cell.
It helps in energy transformation.
3.) A new trait that allows a more efficient release of energy from food appears in a fly population. The trait proves beneficial to survival and quickly spreads through the population. Which is the MOST likely origin of the new trait?
the mutation of a gene that results in an altered protein
the replication of a gene that produces an increase in RNA
the combination of recessive genes in each generation
the adaptation of a new genes to existing genes in the digestive system

Answer 1

1 gene insertion

2 it codes proteins

3 the mutation of a gene that results in an altered protein

hope it helps @_@

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