Answer:
[The recent activities of fossil fuel combustion has had adverse effects on the ozone layer]- B.
To be able to compare the results to a sample without any of the independent variable added.
Answer:
Newton's third law of motion is For every action, there is an equal and opposite reaction.
Explanation:
So if you throw a tennis ball and then hit it with a tennis racquet then the action would be the tennis ball and the equal and opposite reaction woul be the tennis ball bouncing off of the tennis racquet.
Chromosome duplications and deletions frequently result in abnormal phenotypes or inviable gametes. Gene dosage is modified is a major contributor to this phenomenon.
In the field of genetics, we can define gene dosage as the quantitative measure or copies of a particular gene that is present in an organism. Abnormalities in the gene dosage at a particular location can cause severe damage to the resulting phenotype.
Gene dosage can lead to chromosome duplications if the copy number or gene product is more and it can cause deletions if the copy number or gene product is less. Such complications will result in abnormal phenotypes or inviable gametes. For example, in Down's syndrome, the person has a modification of the 21st chromosome as there is one extra 21st chromosome present. This leads to a variety of diseases and defects in the person.
Although a part of your question is missing, you might be referring to this question:
Chromosome duplications and deletions frequently result in abnormal phenotypes or inviable gametes. Which factor is a major contributor to this phenomenon?
a. Recessive diseases are unmasked by additional copies.
b. The genes are found in a novel arrangement.
c. Gene dosage is modified.
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