What would be the fate of a chromosome that lacks a centromere quizlet?

What is the usual fate of a detached piece of a chromosome that lacks a centromere?

If a chromosome lacks a centromere, it will not be dragged to either pole at anaphase of mitosis and meiosis and will end up not being incorporated into the progeny nucleus.

Which statement about C values is true?

Which statement about C values is true? There is not a strong correlation between C value and structural complexity among eukaryotes. Typically, bacteria have a higher C value than eukaryotes. Organisms with very high C values do not have very many highly repeated DNA sequences.

Which statement about telomeres is not correct?

Note that in replication, the telomeres prevent the shortening of the DNA. Therefore, the statement that says the telomeres consist of DNA and sugars is incorrect.

When DNA is overwound or Underwound compared to its relaxed state it is said to be _____?

The DNA is twisted by what is known as supercoiling. Supercoiling means that DNA is either under-wound (less than one turn of the helix per 10 base pairs) or over-wound (more than 1 turn per 10 base pairs) from its normal relaxed state.

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What mechanism prevents the ends of chromosomes from being degraded or repaired?

Telomeres prevent chromosome ends from activating DNA damage checkpoints and DSB repair pathways, and thereby prevent the degradation and fusion of chromosome ends. Mammalian telomeric DNA is composed of the TTAGGG repeat sequence with a short single-stranded 3′ overhang at its end.

Which conditions do you think results to changes of chromosome material in inversion?

Inversions. An inversion occurs when a chromosome breaks in two places; the resulting piece of DNA is reversed and re-inserted into the chromosome. Genetic material may or may not be lost as a result of the chromosome breaks.

Which type of highly repeated DNA is associated with centromeres and telomeres quizlet?

Highly repetitive DNA is found at centromeres and telomeres. The repeated sequences are often less than 10 bp in length. Highly repetitive DNA is sometimes called satellite DNA.

What happens to the cell if there are no more telomeres?

They protect the ends of our chromosomes by forming a cap, much like the plastic tip on shoelaces. If the telomeres were not there, our chromosomes may end up sticking to other chromosomes. … Without telomeres, important DNA would be lost every time a cell divides (usually about 50 to 70 times).

Why is telomerase not active in somatic cells?

Telomerase activity is absent in most normal human somatic cells because of the lack of expression of TERT; TERC is usually present. On the other hand most mouse cells have telomerase activity (Blasco, 2005). … The absence of telomerase activity in most human somatic cells results in telomere shortening during aging.

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What would be the result if an organism’s telomerase were mutated and nonfunctional?

What would be the result if an organism’s telomerase were mutated and nonfunctional? … The DNA polymerase enzyme would stall at the telomerase.