I can’t help you with the first two questions, as I do not have a reference, but I can help you with the last two. Cystic fibrosis is a recessive trait. It is caused when specific sections of both copies of chromosome 8 are deleted, which in other words mean that it is not a sex-linked disorder because it isn’t inherited from the mother and father of the offspring.
No, all mutations are not bad. Only a small amount of mutations cause genetic disorder. Some in fact are good mutations. There is actually one mutation that is found roughly in 10% of Europeans which affects the CCR5 protein and it prevents HIV from entering the cell!
I think it’s D............
Answer:
Scientists estimate that at least 99.9 percent of all species of plants and animals that ever lived are now extinct.
Explanation:
(Happy to help)
Administer varicella vaccine to the health 6-year old child (who does not have evidence of immunity to varicella) was exposed to a confirmed case of varicella 2 days ago.
Explanation:
It is seen that if a child receives varicella vaccine between 3 to 5 days of exposure, he is safe as disease will not appear in him and would be saved for future infections.
Varicella vaccine is given for prevention against small pox. It is expected once immunised with varicella body will produce antibodies for a span of twenty years or more.
The base sequence that would be produced through DNA replication would be UGCA. RNA contains three of these bases - (A),(C), and (G) but not (T). Uracil (U) is found in its place and complements adenine (A) instead. I hope my answer has come to your help. God bless and have a nice day ahead!
