Answer:
First, the zygote becomes a solid ball of cells. Then it becomes a hollow ball of cells called a blastocyst. Inside the uterus, the blastocyst implants in the wall of the uterus, where it develops into an embryo attached to a placenta and surrounded by fluid-filled membranes.
Answer:
siRNA.
Explanation:
The RNA interference may be defined as the evolutionary conserved mechanism that helps in the gene regulation by the silencing of the small RNA molecules. Two main types are siRNA and miRNA.
The siRNA (small interference RNA) is involved in the protection of the cell by destroying the exogenous ds DNA of the cell. The DICER enzyme plays an important role in the processing of the small interference RNA and the guide strand of RNA is involved in the gene silencing.
Thus, the answer is option (a).
It seems that you have missed the necessary options for us to answer this question so I had to look for it. Anyway, here is the answer. The genetic or chromosomal abnormality that is correctly matched with its description is this: Phenylketonuria—the child cannot produce a critical enzyme, resulting in an accumulation of <span>poison, in turn causing mental disorder. Hope this helps.</span>
