The process in which rock fragments freeze to the bottom of a glacier and get carried away when the glacier moves is called plucking. Hope this helped!
Answer:
Addition of nucleotides to form a complementary strand of DNA.
Explanation:
Replication of the genetic material (DNA) is a paramount process that must be undergone by any cell prior to its division. The series of processes that occurs to the DNA molecule during DNA replication is catalyzed by different enzymes with specific functions. However, one of these enzyme callee DNA POLYMERASE catalyzes the main event, which is the synthesis of a complementary strand.
DNA polymerase catalyzes the production of phosphodiester bonds that joins the nucleotides. The enzyme synthesizes a nuceleotide base complementary to the one on the template strand, to eventually form a new DNA strand. Hence, blocking the function of this enzyme is tantamount to blocking the synthesis of a new strand itself.
Answer:
B. 1/2 and 1/4
Explanation:
Hemophilia is a rare disease that has to do with the inability for blood to clot. It is inherited on the X chromosome, hence, it is said to be X-linked. It is usually passed from mother to son. According to this question;
X - unaffected X chromosome
x = X chromosome affected by hemophilia
Y = Y chromosome
Therefore, in a cross between a Xx female (carrier) and a XY male (unaffected), the following chromosomes will be present in the gametes produced by each parent:
Xx- X and x gametes
XY- X and Y gametes
Using these gametes in a punnet square (see attached image), offsprings with genotypes: XX, Xx, XY and xY will be possibly produced.
XX (1) - unaffected female
Xx (1) - unaffected but carrier female
XY (1) - unaffected male
xY (1) - affected male (have hemophilia)
Based on the questions;
- 2 out of the possible 4 children will have the affected chromosomes i.e. both xY son and Xx daughter have the affected (x) chromosome. Hence, the fraction is 1/2
- 1 out of the 4 possible children is affected by hemophilia, which is the xY son. Hence, the fraction is 1/4.
Water typically cannot get as cold as ice does. Since water is warmer, the ice breaks down. that's why it makes your drinks colder and then the ice later melts.