Answer:
Barr bodies are small bodies that are dark staining bodies that show the inactivated X chromosome, these sex chromatin bodies attach to the membrane of the nucleus of interphase cells.
One less of the total number of X-chromosome (n-1) represents the number of Barr bodies.
Then,
The number of Barr bodies with Klinefelter would be:
Klinefelter (47,XXY): (n-1) = (2-1) = 1 Barr body as here two X chromosome present.
Similarly, for
Turner (45,XO): (n-1) = (1-1) = 0 Barr bodies (X chromosome = 1)
Now, as per the question, the bar bodies for karyotypes given
47,XYY: (n-1) = (1-1) = 0 Barr bodies
47,XXX: (n-1) = (3-1) = 2 Barr bodies
48,XXXX: (n-1) = (4-1) = 3 Barr bodies
The question is incomplete as it does not have the options which are:
photoreactivation
reactivation repair pathway
nucleotide excision repair pathway
UV repair pathway
p53 repair pathway
Answer:
p53 repair pathway
Explanation:
ATM gene or ataxia telangiectasia-mutated is a gene which codes for the protein kinase involved in the DNA double-stranded break.
The DNA double-stranded break is repaired easily as the protein kinase is recruited to the site of the break where it allows the DNA repair machinery to repair the DNA.
The gene also controls the cell growth therefore this gene is important to study cancer. Since the p53 protein is a suppressor protein which if mutated is repaired by the ATM gene and if the gene becomes mutated then the p53 repair pathway is affected.
Thus, p53 repair pathway is the correct answer.
Darwin was offfered a position as a naturalist on the HMS Beagle, one of the Britsh Royal Navy's survey ship.
Answer:
1.2 stands for 2 atoms of hydrogen and 1 atom of oxygen
2.carbon and oxygen
3.
4.
5.
6.
Answer:
Cloud condensation nuclei or CCNs are small particles typically 0.2 µm, or 1/100 the size of a cloud droplet on which water vapor condenses. Water requires a non-gaseous surface to make the transition from a vapour to a liquid; this process is called condensation.
MAYBE I THINK ;)
