About 95% of the time down syndrome is caused by “trisomy 21.”the person has three copies of chromosome 21, instead of the usual two copies, in all cells. This is caused by abnormal cell division during the development of the sperm cell or the egg cell.
Answer:
thermosphere(80 - 480 km from Earth's surface)
Explanation:
characteristics
- cloudless and free of water vapour
- the phenomenon of aurora is seen in this layer
- the bottom part of the thermosphere is known as the ionosphere
- the ionosphere has very high temperatures due to the presence of charged particles or ions. The ions function as a reflector of electromagnetic waves in long distance telecommunications.
Answer:
c) methyltransferase. DNAse.
Explanation:
The way DNA is folded can affect gene expression, or which genes are turned on. When the chromosomes are tightly condensed, the DNA is wrapped very tightly which makes it difficult for transcription factors to bind to the DNA.
Answer:
a
Explanation:
my reason is that the capacity carrying is 35
