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2 years ago

What are the benefits of mitochondrial DNA and ribosomal RNA as molecular clocks

Biology

2 answers:

tigry1 [53]2 years ago

5 0

there is no benefits

madam [21]2 years ago

3 0

Answer:

The rate of mutation is faster than that of nuclear DNA.

Explanation:

Molecular clock is a term used to describe the genetic technique that allows the study of evolution at the molecular level, relating the time of divergence between species compared to the molecular differences in DNA sequences or in the composition of proteins.

In this case, the DNA of the mitochondrial and that of the ribosome is more advantageous to be used as a molecular clock. This is because the rate of mutation of these DNAs is much higher than the rate of nuclear DNA. This allows the researcher to identify many polymorphic regions that were generated in an evolutionary process of millions of years. As the mutation rate is constant, the large number of polymorphisms in these DNAs make them the best option as biological clocks

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During pregnancy, a cell undergoes what appears to be a normal mitotic nuclear division. However, two daughter cells with 2n-1 a

dem82 [27]

Answer:

c. Two sister chromatids did not separate into the proper daughter cells during anaphase.

Explanation:

The observed cell is undergoing mitosis which does not include separation of homologous chromosomes. During anaphase of mitosis, two sister chromatids of each chromosome separate from each other. They move to opposite poles. This results in equal distribution of two complete sets of chromosomes to each daughter cell.

However, the failure of two sister chromatids of a chromosome during anaphase would lead to the formation of two abnormal daughter cells. One of the daughter cells would have one extra chromosome (2n+1) while the other would lack one chromosome from the diploid set (2n-1).

8 0

2 years ago

What unifying theme brought the work of Mendel and Darwin together in the big picture of

fenix001 [56]

Answer:

A: Discovery of DNA as the genetic material

Explanation:

DNA is the genetic material and stretch of DNA that codes for a specific protein is called as gene. Discovery of DNA as genetic material provided the physical proof of Mendel's factors that were responsible for transmission of genetic traits in his experiment.

Discovery of DNA as genetic material also established that genetic variations among individuals of the species as described by Darwin are due to minor differences in their DNA molecules.

Hence, discovery of DNA as genetic material led to acceptance of both Mendel's law and Darwin's theory.

4 0

3 years ago

Which of the following does not cycle quickly!<br> A) Wood<br> B) Oil<br> C) Water<br> D) Carbon

miv72 [106K]

Answer:

I believe it is be

Explanation:

Depending on the type oil, it can be natural and non renewable

3 0

2 years ago

Read 2 more answers

Cells can make ATP through aerobic respiration, anaerobic respiration, or fermentation. Which of the following pathways do all t

Rainbow [258]

Answer:

Explanation:

it will break down to co2 which is absorbed in the body to form glucose to release energy

4 0

1 year ago

A recent study reported by de meyer and others revealed that _____, which is a protein fragment that forms plaques in the brain,

FinnZ [79.3K]

The answer is amyloid beta. They clump together and form plaques. The formed plaque can block signals transmitted from one cell to another cell. In addition, the plaque can cause swelling, especially in the area where it is formed. It can also digest the disabled cells. This type of plaque is very common among patients with Alzheimer's Disease.

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3 years ago