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Korolek [52]
3 years ago
12

A tiny drop of blood can provide DNA for DNA fingerprinting, although the analysis requires much more material than the blood sa

mple provides. How does the analyst obtain enough DNA for the test?
Chemistry
1 answer:
GuDViN [60]3 years ago
8 0

Answer:

Almost every cell? in our body contains our DNA?.

On average, about 99.9 per cent of the DNA between two humans is the same.

The remaining percentage is what makes us unique (unless you are an identical twin!).

Although this might sound like a small amount, it means that there are around three million base pairs? that are different between two people. These differences can be compared and used to help distinguish you from someone else.  

Minisatellites are short sequences (10-60 base pairs long) of repetitive DNA that show greater variation? from one person to the next than other parts of the genome?. This variation is exhibited in the number of repeated units or ‘stutters’ in the minisatellite sequence.

Explanation:

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A deck of cards has dimensions 8.9cm x 5.72cm x 1.82 cm. What is the volume of the deck in cubic centimeters?
arsen [322]

Answer:

92.65256 cm^3

Explanation:

To find this, we can simply multiply all three dimensions to get the answer in cubic centimeters, and we get the answer above. If you want to be more specific, we can go by the sigfig rule and the answer would be rounded to 93 cm^3.

5 0
3 years ago
Oxygen has 6 valence electrons. How many electrons does an atom of oxygen need to become stable?
SOVA2 [1]

Answer:

Two electrons

Explanation:

According to the octet rule, atoms must bond to each other, sharing electrons among themselves in an attempt to complete their valence shell (last layer of the electrosphere). In other words, an atom becomes stable when it has 8 electrons in its valence shell.

Oxygen atoms have six electrons in their valence shell, so to achieve the stability suggested by the octet rule (eight electrons), these atoms share two electrons, forming one oxygen gas (O₂) molecule.

8 0
3 years ago
Read 2 more answers
10 POINTS.
enot [183]

There are a total of 40 valence electrons in the PCl5 Lewis structure. Remember when you draw the Lewis structure for PCl5 that Phosphorous (P) is in Period 3 on the Periodic table. This means that it can hold more than 8 valence electrons.



I hope this helps and please don't report

7 0
3 years ago
The picture on the left represents the reactants in the equation and the picture on the right represents the products. Does this
JulijaS [17]
According to Law of conservation of matter," matter can neither be created nor destroyed but is conserved and remains constant over time'.

In above picture let suppose the Blue balls represent N₂ molecule and White balls represent H₂ molecules.

So, left picture represent reactants,

                                    2 N₂  +  6 H₂

And , right picture represent products,

                                     4 NH₃

So, there are 4 N atoms and 12 Hydrogen atoms in reactants and 4 N atom and 12 Hydrogen atoms in products. Means the mass of elements is conserved. The overall reactions is as follow,


                                    2 N₂  +  6 H₂   →   4 NH₃

Result:
          Yes! This reaction follow Law of conservation of Matter.
6 0
3 years ago
What is strong acid?​
tamaranim1 [39]

Answer:

A strong acid is one which is virtually 100% ionized in solution. Other common strong acids include sulphuric acid and nitric acid.

Explanation:

7 0
3 years ago
Read 2 more answers
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