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abruzzese [7]
3 years ago
6

4. what two main things happen during Prophase of Mitosis? Why is each necessary for the cell to divide? What

Biology
1 answer:
Anni [7]3 years ago
3 0

Answer:

The two main things happen during Prophase of Mitosis are given below.

1) In prophase stage of mitosis, condensation of chromosomes occurs which is necessary for the formation of daughter cells.

2) Breakdown of nuclei occurs and moves to the opposite poles.

If this phase is not take place during mitosis, the cell will not divide into daughter cells

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Number 23 ASAP please
inn [45]

Answer:

Nitrate and phosphate levels rise at a rapid rate

Excessive Plant growth and algal blooms cover the surface of the pond, blocking out sunlight.

Underwater plants begin to die due to lack of photosynthesis, which reduces the amount of dissolved oxygen in the water. Animals also begin to die due to less plants available for food.

Explanation:

5 0
3 years ago
Two genes, A and B, are located 30 map units apart. A mating between an individual homozygous dominant for both traits and one h
Westkost [7]

Answer:

35%

Explanation:

If two genes are 30 map units apart, 30% of the produced gametes will be recombinant.

A mating between an individual homozygous dominant for both traits (AB/AB) and one homozygous recessive for both traits (ab/ab) is conducted.

The F1 will be heterozygous for both genes: AB/ab.

The F1 progeny is then test-crossed to a homozygous recessive individual:

<h3>AB/ab X ab/ab</h3>

<u>The possible offspring will be:</u>

  • Parental (70%): AB/ab and ab/ab
  • Recombinant (30%): Ab/ab and aB/ab

Since 30% of all the gametes produced by the F1 individual will be recombinant, 70% will be parental. As there are two types of parental gametes, each of them will have a frequency of 35%.

<u>The offspring that will have a dominant phenotype for both traits has the genotype AB/ab with a proportion of 35%.</u>

8 0
3 years ago
A researcher isolates the blood of an individual who is sick. The blood is filtered through a porous material that will prevent
stich3 [128]

The answer would be A. a virus

The question states that the blood was filtered thru a porous material that prevented <u>all cells </u>from passing thru.

All of the options are cells except viruses.

Hope this helps:)

7 0
2 years ago
Read 2 more answers
Given the gene sequence ACGGCATTCGTACGT, which of the following choices would represent an insertion mutation?
skad [1K]

Answer:

D.ACGGCATATCGTACGT

Explanation:

D because ACGGCATATCGTACGT the A in between the 2 t's was added

5 0
3 years ago
Read 2 more answers
How do the structure of adenine and
elena-14-01-66 [18.8K]
Adenine forms two hydrogen bonds with thymine in DNA while three hydrogen bonds are formed between guanine and cytosine.

Thymine and cytosine are pyrimidines because they have a single ring structure. Adenine and guanine are purines because they have a double ring structure.
6 0
3 years ago
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