1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
NeTakaya
3 years ago
5

Meiosis occurs in a series of different phases and creates genetically unique reproductive cells. The steps of meiosis are shown

. Which process helps make meiotic cells genetically different and occurs during prophase I, but not during prophase II?
Biology
1 answer:
BARSIC [14]3 years ago
4 0

Answer:

Crossing-over

Explanation:

Meiosis is a kind of cell division that occurs only in sexually-reproducing organisms. It is the process by which they produce gametes. Meiosis is that division in which the number of chromosomes in the resulting cells are reduced by half. Due to this reason, meiosis occurs in a two step division process viz: Meiosis I and II.

Meiosis produces genetically different reproductive cells. This is as a result of a phenomenon unique to only meiosis called CROSSING-OVER. Crossing-over is a process whereby non-sister chromatids of homologous chromosomes exchange a segment of their genetic material. It occurs only in Prophase 1 of meiosis where the TETRAD structure is formed. This exchange of genetic material causes a recombination of DNA in the resulting cell (gamete).

Crossing-over only occurs between non-sister chromatids of homologous chromosomes, hence, it can only occur in Prophase 1. Prophase II involves sister chromatids.

You might be interested in
Which is the order of airflow during inhalation?
tigry1 [53]

Answer:

Nasal cavity, larynx, trachea, bronchi, bronchioles, alveoli.

Explanation:

The air travels through the respiratory system during inhalation in the next order:

  1. <em><u>Nasal cavity:</u></em> You inhale air into your nose.
  2. <u><em>Larynx:</em></u> The air travels down to this organ, a hollow, tubular structure that plays a key role in phonation, respiration, and deglutition.
  3. <u><em>Trachea:</em></u> (Or <em>windpipe</em>) is a wide, hollow and cartilaginous tube that connects the larynx to the bronchi.
  4. <em><u>Bronchi:</u></em> The trachea divides into two primary bronchi; they are the main passageway into the lungs.
  5. <em><u>Bronchioles: </u></em>The bronchi develop smaller the closer they get to the lung tissue and are then consider bronchioles.
  6. <em><u>Alveoli:</u></em> They are tiny air sacs located at the end of the bronchioles, which is the site of oxygen and carbon dioxide exchange in the respiratory system.

8 0
3 years ago
Ram started his bussiness with cash re 500000 journilise the question​
marissa [1.9K]

Answer:

___________________________________

Date Particular L.F Debit Credit

___________________________________

a. Cash a/c Dr. 500000

To capital a/c. 500000

___________________________________

<h3>Some rules of Debit and credit:</h3>
  • Personal account

Personal account is related to proper noun like name of person, name of bank and company.

Rules for personal account:

Debit: the receiver

Credit: The giver

Personal Account is used to record credit transactions.

  • Real account

It is related to visible things except personal account terms.

For example: Goods, Cash, Furniture, Vehicles, Buildings.

Rules for Real Account:

Debit: What comes in

Credit: What goes out

  • Nominal Account

Nominal account refers to those things which cannot be seen but can be expressed in terms of money.For example: Rent, Salary, Wages, Commission, Tax etc.

Rules for Nominal Account:

Debit: All expenses and losses

Credit: All income and profit

Note: Every debit should have equal credit.

Hope this helps..

Good luck on your assignment...

3 0
3 years ago
what happens when error occur during dna replication rna transcription or the translation of mrna into proteins
Ivanshal [37]
when replication mistakes are not corrected they may result in mutations which sometimes can have consequences
8 0
3 years ago
Read 2 more answers
Forensic scientists can match missing persons and their families by matching maternal DNA to the missing individual.
iris [78.8K]

Answer:

The mitochondrial DNA (mtDNA) is passed down from the mother to the children almost unchanged. The analysis of mtDNA has provided the forensic scientist with essential tools for determining the source of DNA that they have recovered even from small biological samples. Thus, the answer to the question above is letter B.

Explanation:

4 0
2 years ago
All of the following statements about prokaryotic flagella are correct EXCEPTA) They are driven by the proton motive forceB) The
KATRIN_1 [288]

Answer: B) im sure 100% broski

4 0
3 years ago
Other questions:
  • Are ecosystems fragile, stable or adaptable?
    8·2 answers
  • Drag and drop words from the boxes below to explain what the data show about the effect of the reintroduction of wolves in yello
    15·1 answer
  • When thinking about membership in a fitness club, what should you consider? personal fitness 12?
    5·1 answer
  • Put in order from first to last
    7·1 answer
  • Please help me!! :((
    12·1 answer
  • Which of these statements is correct?
    8·1 answer
  • How do plants absorb water
    5·1 answer
  • Explain how horned toads squirting blood from their eyes is a particularly good defense against coyotes.
    8·1 answer
  • Which is hotter, 30°c or 30°f? How do you know?
    9·1 answer
  • What geologic activity occurs at continental- convergent plate boundaries?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!