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Hatshy [7]
3 years ago
7

A group of cells is assayed for DNA content immediately following mitosis and is found to have an average of 8 picograms of DNA

per nucleus. How many picograms of DNA would be found in a nucleus at prophase of mitosis?
Biology
1 answer:
creativ13 [48]3 years ago
8 0

Answer:

16 picograms

Explanation:

According to the given information, the observed cells have 8 picograms of DNA after mitosis. If these cells enter the cell cycle, DNA replication will take place during the S phase of the interphase of the cell cycle. The process of DNA replication would double the DNA content of these cells making it 16 picograms per nucleus.  

The S phase of the interphase is followed by the G2 phase and then prophase during which there is no change in the DNA content of the cells. Hence, each of these cells would have 16 picograms of DNA at the prophase of mitosis.  

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Mice collected from the Sonoran desert have two phenotypes, dark(D) and light (d). The mice shown below were collected in a trap
lesantik [10]

Answer:

Frequency of individuals with recessive trait(dd)= 71.4 %

Explanation:

Please see the attached.

In the image it is clear that there are total 26 mouse out of which 6 are dark colored.

Since dark color allele is dominant, these  6 dark colored mouse will have genotype either  DD or Dd

The individuals with genotype "dd" will be of light color.

Number of light colored mouse = 21 -6 = 15

Frequency of individuals with recessive trait(dd)

= \frac{15}{21} * 100\\

= 71.4 %

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4 years ago
How does genetic variation create new species over time?
jolli1 [7]

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4 years ago
What is the most likely effect a decrease of plant life in the biosphere would have on the atmosphere?
lianna [129]
B.
<span>A decrease in plant life would cause carbon dioxide levels to increase and oxygen levels to decrease.</span>
6 0
4 years ago
What may have aided the polymerization of amino acids into peptides in the oceans of early prebiotic earth?
Katen [24]

The presence of mineral surface for the amino acid to adhere to may have aided the polymerization of amino acids into peptides in the oceans of early prebiotic earth.

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7 0
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Tumor-suppressor genes help prevent uncontrolled cell growth. One that is found mutated (and therefore nonfunctional) in more th
Paha777 [63]

Answer:

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Mutations in the p53 can also cause the tumor-suppressing genes to convert into tumor causing genes. Hence, mutations in such kind of genes can be very harmful for the body.

4 0
3 years ago
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