Answer:
(c) one chromatid each of both homologs.
Explanation:
The S phase is characterized in that the chromosomes are duplicated, in this way a copy is created and this copy is united forming chromatids. In meiosis it is characterized in that the homologs are assembled. According to the exercise, the S phase was incubated using 3H, presumably the chromosomes will have a chromatid to support the 3H residues. Later when the homologs assemble, each of those homologs would have a chromatid to withstand such radioactivity.
Answer:
Computional model, used to study an outbreak of an infectious disease called influenza.
Answer:
With respect to the composition of DNA, in an analysis it can be found that the proportions of nucleotides are A + C = G + T (option a).
Explanation:
The proportion of nucleotides in a DNA molecule can be established according to the sequence of these nucleotides on both complementary strands, since the purinic bases of one strand are complemented by the pyrimidinic bases of another:
- <em>Adenine is complemented with Thymine A=T</em>
- <em>Guanine is complemented with Cytosine G=C</em>
From this we can deduce that in a DNA molecule with two chains there will be the same amount of adenine and thymine, as well as the same number of guanine with respect to cytosine, so:
<em> A + C = G + T</em>
An example of this would be a known DNA molecule (hypothetical), with 5 molecules of Adenine and 7 molecules of Guanine. In this case there are 5 Thymines, complementary with Adenine, and 7 Cytosines like Guanine:
<em> A + C = G + T</em>
<em> 5 + 7 = 7 + 5</em>
