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Liono4ka [1.6K]
3 years ago
11

During the replication process, polymerase proofreads the DNA molecule so that few mistakes or ___________ occur. A) interferons

B) mutations C) oppositions D) vexations
Biology
2 answers:
White raven [17]3 years ago
5 0

Answer:

B) mutations

Explanation:

Few mutations also take place during the DNA replication process.

However, DNA polymerase also has proofreading property by which it checks for the mismatch bases and corrects it.

AnnZ [28]3 years ago
3 0

Answer:

The correct answer for: During the replication process, polymerase proofreads the DNA molecule so that few mistakes or ___________ occur. Is: B) mutations

Explanation:

To understand this question we need to review all the options after we understand what polymerase is.

First of all, the polymerase is an enzyme that synthesizes chains of DNA and RNA. In other words that provide material to unite and copy DNA and RNA chains.

a) is incorrect because interferons are not an effect of DNA or RNA synthesis.

b) It is correct because of polymerase copies and unites the DNA and RNA chains. So, it needs to verify it does it in the best way I cans. Reducing the number of failures or mutations.

c) oppositions are not involved in the process of DNA and RNA synthesis. So, it is incorrect. Also, some oppositions in the DNA alleles will occur if we follow the posture of allele hierarchy.

d) vexations are incorrect because they are not a mistake. They are repetitions and they are meant to be produced to create a new chain.

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The blood Group of Mother is O. The Blood Group of the Child is B. Man Exonerated If He to Blood Group?​
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Answer:

If the mother's blood type is O, and the child's blood type is B, a man would be exonerated from paternity if he has blood type A or O.

Explanation:

In the above case, if a mother has blood type O and her child has blood type B, a man can be exonerated from paternity only if his blood type is A or O, and responsible if he is type B or AB.

The blood type is defined by the presence of surface antigens in the red blood cell, called A and B. The presence of each antigen is determined by a gene present on the parental chromosomes.

  • <em> </em><u><em>Blood type A</em></u><em> corresponds to the presence of gene A, and its genotypic expression can be A/A or A/O. </em>
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By making a hypothetical crossing between mother and man, one can observe why he can be exonerated.

<u>Man with blood type O </u>

♂ O|O

♀ O|O

Alleles     O      O

O           O|O   O|O

O           O|O   O|O

The only possibility, in this case, is to have children with type O blood. No chance of children B.

<u>Male with blood type A </u>

♂ A|O

♀ O|O

Alleles     A        O

O            A|O    O|O

O            A|O    O|O

In this case there is a 50% chance that the children will be blood type A and 50% chance that they will be O. No chance of children B.

In the case of a man A|A the result is 100% probability of children A|O, and no probability of children B.

<em>So, a </em><em>man with blood types A (any genotype) and O, can be exonerated from paternity</em><em>, since it is </em><em>impossible for him to have a child of blood type B, when the mother is of blood type O</em>.

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