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xz_007 [3.2K]
3 years ago
8

Why did the invention of pcr make dna fingerprinting possible

Biology
2 answers:
Dafna11 [192]3 years ago
7 0
PCR made it possible to produce enough copies for reliable tests. APEX
Svetlanka [38]3 years ago
6 0
Answer:

With the invention of the PCR technique , DNA profiling took huge strides forward in both discriminating power and the ability to recover information from very small or degraded starting samples.

The process of PCR mimics the biological process of DNA replication but confines it to specific DNA sequences of interest.

In PCR process , the DNA sample is denatured into separate individual polynucleotide strands through heating. Two oligonucleotide DNA primers are used to hybridise to two corresponding nearby sites on opposite DNA strands. Thus two new copies of the sequences of interest are generated.

Repeated denaturation , hybridisation and extension in this fashion produce an exponentially growing number of copies of the DNA of interest.

Quantitative PCR methods enable automated , precise and high - throughput measurements.

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In normal humans, sex cells contain the _________ number of chromosomes.
Nadya [2.5K]

Answer: Haploid number

In normal humans, sex cells contain the diploid number of chromosomes

Explanation;

Human somatic cells or body cells are diploid such that they contain two sets of 23 chromosomes which gives a total of 23 chromosomes. Examples of somatic cells in the body that are diploid include, epithelial cells, somatic cells, liver cells, blood cells, nerve cells, etc.

However, mature sex cells are haploid, which means they have one set of 23 chromosomes which means they have 23 chromosomes. Sex cells are the results of meiosis type of cell division in which a diploid cell divides to form four daughter cells that are haploid.

3 0
2 years ago
What are the largest and smallest group of classification?
Licemer1 [7]
A. Kingdom and species.
5 0
3 years ago
A scientist was studying bones from an individual who died thousands of years ago. Which portion of the bones was the scientist
ludmilkaskok [199]

Answer: Minerals

Explanation: The body decomposes and after about 40 to 50 years bones are mostly brittle and dry with no traces of flesh. After thousands of years bones also disintegrate (decay) leaving brittle mineral frame. The life of bones is determined by the soil type its buried in, nuetral soils takes longer then acidic soil condition.

In this case osteocytes(bone cells) are the first to decompose followed by the cartilage and bone marrow, leaving behind mineral traces that scientist can study after thousand years.

7 0
3 years ago
Read 2 more answers
A man who is a dwarf with achondroplasia and normal vision marries a color-blind woman of normal height. The man's father was si
Akimi4 [234]

Correct options A) None

Autosomal dominate refers to alleles harbored by any chromosome other than the sexual pair that show complete dominance over the recessive ones.

The dwarf male father with normal height is homozygous recessive for achondroplasia. The male of heterozygous for the character because this is autosomal dominant. He is also normal vision reason he is X-NY.

The women is color blind and normal height. The cross is X-NYAa x XnX naa. The father will produced gametes x-NA,X-Na , YA and Ya and the mother only gamete X-na. So the son of this type of couple is X-nYAa which can be color blind and dwarf and normal height.

To learn more about Autosomal dominate here

brainly.com/question/16021870

#SPJ4

7 0
1 year ago
What is the usual CORRECT pairing of DNA? Look closely at the picture to figure it out.
Korvikt [17]

Answer:

B. C-G and A-T

Explanation:

The pairings are adenine and thymine and cytosine and guanine

3 0
2 years ago
Read 2 more answers
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