Chromosome duplications and deletions frequently result in abnormal phenotypes o

Question

Chromosome duplications and deletions frequently result in abnormal phenotypes or inviable gametes. Which of the following is a major contributor to this phenomenon? Recessive diseases are unmasked by additional copies. The genes are found in a novel arrangement. Gene dosage is modified Why are these effects less noticeable for multisomies and monosomies of the X chromosome in humans? The X chromosome only has a few genes. The X chromosome is not necessary for human survival. X inactivation only allows one X chromosome to be expressed in any given cell.

Explanation / Answer

Answer:-

Ques 1 :-

Ans:- Gene dosage is modified.

Duplications result in extra copies of genes and deletions result in loss of DNA sequences or loss of genes. So gene dossage is modified.

Ques2:-

Ans:- X inactivation only allows one X chromosome to be expressed in any given cell.

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