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SVETLANKA909090 [29]
3 years ago
5

What makes mitochondrial DNA useful as a molecular clock?

Biology
2 answers:
Hoochie [10]3 years ago
7 0

The correct answer is D

As compared to nuclear DNA, the mtDNA (mitochondrial DNA) experiences very less mutations. Due to this slow mutation rates, it does not change much over the time. It makes it a good candidate for studying the evolutionary relationship between the species.

In addition, it is mainly inherited from mother’s cytoplasm which also allows the scientists to trace back the maternal ancestral lineage.

White raven [17]3 years ago
6 0

Answer:

A large portion of the DNA ring is not vital to structure or function, allowing it to accumulate neutral mutations.

Explanation:

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3 years ago
In cats the allele for short hair is dominant over the allele for long hair. A short haired male and long haired female have kit
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Genotype of parents:                  Ss     x     ss

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Explanation:

In cats the allele for short hair is dominant over the allele for long hair. (SS or Ss for short hair; ss for long hair).

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For the parents to have been able to produce long haired offsprings, it means both parents possess one copy each of the recessive traits. Thus we have

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Genotype of parents:                  Ss     x     ss

Genotype of offsprings:                  Ss    ss

Expected ratio of short to long:      2  :   2 = 1 :  1

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