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Nadya [2.5K]
2 years ago
15

How does the fact that telomeres are long stretches of repeated nucleotides lessen the impact that somatic cells don’t have te

lomerase?
Biology
1 answer:
Cloud [144]2 years ago
4 0

Telomerase activity is controlled during development and is extremely low in somatic (body) cells, virtually undetectable. These somatic cells age because they do not frequently use telomerase.

  • Telomeres are repetitive sections at the very ends of chromosomes that are present in a variety of eukaryotic species, including humans and unicellular protists.
  • Each round of DNA replication wears down a little portion of the telomeres, which serve as caps to safeguard the interior chromosomal regions.
  • Most somatic (body) cells do not typically have telomerase activity, but certain adult stem cells and germ cells—the cells that produce sperm and eggs—have.
  • Adult germ cells, tumor cells, and fetal tissues all contain telomerase. Telomerase activity is controlled during development and is extremely low in somatic (body) cells, virtually undetectable. These somatic cells age because they do not frequently use telomerase.

learn more about telomerase here: brainly.com/question/14213408

#SPJ4

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A yellow female Labrador retriever was mated with a brown male. Half of the puppies were brown, and half were yellow. Explain ho
Over [174]

Answer:

The first male was bb Ee, and the second male was bb EE.

Explanation:

In Labradors coat colour is controlled by two genes. Suppose the two genes are B and E. B produces black colour and recessive form bb gives brown colour. Gene E is epistatic over gene B in its recessive form which means that ee will produce yellow colour regardless of the genotype present of B gene.

The first case is possible if the female lab is bbee (yellow) and the male lab is bbEe (brown):

bbee X bbEe

        bE      be

be  bbEe    bbee

So half of the offspring will be brown (bbEe) and half of them will be yellow (bbee)

The second case is possible if the same female bbee mates with a brown male of different genotype which can be bbEE:

bbee X bbEE

         bE

be   bbEe

So all offspring will be brown (bbEe)

Hence, the first male was bbEe and the second male was bbEE.

6 0
3 years ago
8. What is nuclear fusion and how does our universe use it?
worty [1.4K]

Answer:

It is the root source of energy the "life blood" of the stars.

Explanation:

8 0
3 years ago
Read 2 more answers
A young child suffers a debilitating condition that includes progressive degeneration of the motor axons that innervate the mass
stiv31 [10]

Answer:

The correct answer is option B. "Tensor veli palatini".

Explanation:

Masseter muscle plays an important role in chewing solid foods while the tensor veli palatini acts elevating the palate and preventing that food goes into the nasopharynx. A progressive degeneration of the motor axons that innervate the masseter muscle will likely produce a similar effect in the tensor veli palatini muscle. Not only both muscles have functions during chewing of food, but also both muscles are controlled by similar motor axons.

3 0
3 years ago
Knowing the epidemiology and causative agent of Legionaries disease what questions would you ask of the victims or of their surv
ioda

Answer:

Answered below

Explanation:

Legionnaires disease is a type of lung inflammatory disease or pneumonia, which is caused by infection from the bacteria Legionella bacterium.

Legionella bacterium can be spread by inhalation from water or soil. People with weakened immune systems are most susceptible as are smokers. Untreated legionnaires disease can progress to a fatality.

Some of the questions to ask of a victim or of surviving relatives include;

1) Any visits to swimming pools?

2) Source of drinking water?

3)Any visits to fountains?

4) Contacts with victims and their personal belongings?

5)Is any relative or victim immunocompromised? Do they have diseases that might lower their immune response?

6) Are they smokers?

8 0
2 years ago
As DNA is replicated, which DNA base pair will bond to cytosine
ELEN [110]
<span>Adenine bonds with Thyamine Guanine bonds with Cytosine and vice-versa</span>
3 0
3 years ago
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