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sergejj [24]
3 years ago
11

How does the molecular clock work?

Biology
2 answers:
ArbitrLikvidat [17]3 years ago
8 0

Answer:

The answer is D

Explanation:

just got it right on edg 2020

Debora [2.8K]3 years ago
4 0
The answer is D
It compares the number of mutations that exist in the DNA of two different species.
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If a cell has a diploid number of 8 (2n = 8) before meiosis, how many chromosomes will be in each of the four daughter cells aft
Naddik [55]

Answer:

The final product is four gametes, two of them with 5 chromosomes, and the other two with 3 chromosomes each.

Explanation:

If nondisjunction occurs during meiosis 1, a pair of homologous chromosomes fail to separate, and one of the daughter cells will have the two chromosomes while the other cell will not get any chromosome from the pair.

If meiosis 1 occurs normally, but nondisjunction occurs in meiosis 2, sister chromatids fail to separate.  

The usual process of meiosis produces four daughter haploid cells (n) from a diploid germ cell (2n). Each daughter cell is haploid because they have half the number of chromosomes of the original one.  

If the diploid number of the original cell is 8 (2n=8), then under normal conditions, each haploid daughter cell should have 4 chromosomes (n = 4).  

But in the exposed example, one pair of homologous chromosomes experiences nondisjunction during meiosis I (in the attached file, you will recognize this pair as the red one). The other chromosomes separate as usual. So one of the daughter cells will have one extra chromosome than expected (five instead of four), and the other daughter cell will lack one chromosome (three instead of four). Meiosis II occurs normally. The final result is the formation of four gametes, two of them with 5 chromosomes, and the other two with 3 chromosomes each.

6 0
2 years ago
if retinal detachment occurs in the macula lutea, one can predict that there would be a significant loss of ______.
vodka [1.7K]
The correct answer is color vision.
The macula lutea is an area near the center of the human's eye retina. It has an oval shape and is responsible for the high-resolution color vision we have under good light conditions. If the macula lutea is destroyed, due to macular degeneration or a retinal detachment, then this color vision is impaired.

3 0
3 years ago
According to the concept of entropy, what will likely happen to most molecules over time?
KonstantinChe [14]
I believe the correct response would be C. The molecules will breakdown.
7 0
3 years ago
Read 2 more answers
Which relationship is an example of commensalim?
azamat
One of the most poplar examples of commensalism is the relationship between cattle egrets and livestock. The cattle egret is a common species of heron that is found in most regions of the world, and is mostly seen moving along with herds of cattle. This bird moves about in pastures, and follows livestock such as cattle and horses.
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3 years ago
If mrnas could be ligated and replicated within plasmids, what enzyme commonly used in recombinant dna technology would no longe
hjlf
The correct answer is reverse transcriptase.  
<span>
Reverse transcriptase is an enzyme used to generate complementary DNA (cDNA) from an RNA. This enzyme is often inserted together with eukaryotic mRNA into bacteria, so that mRNA could be inserted into the bacteria's genome.</span>
7 0
2 years ago
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