Give me a simple example of gene therapy!

Gene therapy is the fairly new method of disease treatment aimed mostly at genetic diseases. Basically, a normal allele is inserted into a patient's defective cells. This is a very new approach and most gene therapy is aimed at cancer treatment and hereditary genetic diseases, such as sickle cell anemia, cystic fibrosis, and muscular dystrophy.

Explanation:

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d. in sexual reproduction, offspring have more chromosomes than

either parent.

asexual reproduction results in offspring which are genetically the same as the parent organism (not counting a rare mutation). sexual reproduction produces a random mixture of the genetics derived from both parents

explanation:

maybe because its impossible for balloons to lift a whole entire house.