The protein encoded by the mutant allele is shorter than the one encoded by the normal allele, the protein encoded by the mutant allele could be non-functional and the mutant allele could be associated with disease. In addition, DNA and mutation can happen possibly wherever on these molecules at any time. The most severe variations take place in the useful units of DNA is the genes in which the mutated form of a gene is named a mutant allele.
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Recessive alleles are usually represented by lowercase letters and require two copies to be expressed
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i don't think the vaccine will help. a lot of people died from it.
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The correct option is B (natural killer cells).
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Natural killer cells: They are defined as the type of cytotoxic lymphocyte which are critical to the innate immune system. The NK cells play an important role in to provide rapid response to tumor formation, virus infected cells, and acting after three days of infection.
While cancer cells die, they release some antigens, than these antigens are recognized by the immune system, and later they are presented on the immune cells which are known as antigen presenting cells. So, if these cells are absent than they increase the chances of developing malignant tumors.
Answer: there is no gravity and no type of life on the moon therefore basically making it a huge target.
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