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
SCORPION-xisa [38]
3 years ago
5

7) This is a type of reproduction where there is a exchange of genetic information in order to create new individuals.

English
1 answer:
sweet [91]3 years ago
8 0

Once this chromosomal condensation has occurred, the members of each chromosome pair (called homologous chromosomes, because they are similar in size and contain similar genes), align next to each other. At this point, the two chromosomes in each pair become tightly associated with each other along their lengths in a process called synapsis. Then, while the homologous chromosomes are tightly paired, the members of each pair trade adjacent bits of DNA in a process called crossing over, also known as recombination (Figure 1). This trading of genetic material creates unique chromosomes that contain new combinations of alleles.

At the end of prophase I, the nuclear membrane finally begins to break down. Outside the nucleus, the spindle grows out from centrosomes on each side of the cell. As in mitosis, the microtubules of the spindle are responsible for moving and arranging the chromosomes during division.

Metaphase I

A schematic shows two pairs of homologous chromosomes arranged in a vertical formation in the middle of a cell. Two developing mitotic spindles flank the four chromosomes. Long fibers radiating from the mitotic spindles are attached to the centromere of each chromosome.

Figure 2: Near the end of metaphase I, the homologous chromosomes align on the metaphase plate.

Figure Detail

At the start of metaphase I, microtubules emerge from the spindle and attach to the kinetochore near the centromere of each chromosome. In particular, microtubules from one side of the spindle attach to one of the chromosomes in each homologous pair, while microtubules from the other side of the spindle attach to the other member of each pair. With the aid of these microtubules, the chromosome pairs then line up along the equator of the cell, termed the metaphase plate (Figure 2).

Anaphase I

A schematic shows each member in a pair of homologous chromosomes separating from its partner and migrating in opposite directions. White spindle fibers attached to the centromeres of each chromosome are responsible for the movement of the chromosomes to opposite poles of the cell.

Figure 3: During anaphase I, the homologous chromosomes are pulled toward opposite poles of the cell.

Figure Detail

During anaphase I, the microtubules disassemble and contract; this, in turn, separates the homologous chromosomes such that the two chromosomes in each pair are pulled toward opposite ends of the cell (Figure 3). This separation means that each of the daughter cells that results from meiosis I will have half the number of chromosomes of the original parent cell after interphase. Also, the sister chromatids in each chromosome still remain connected. As a result, each chromosome maintains its X-shaped structure.

Telophase I

A schematic shows two overlapping, circular cells, each with a nucleus and two chromosomes. The cytoplasmic portions of the cells are light grey, and the nuclei are dark grey. The chromosomes in the left-hand cell are mostly green, but the lower regions of the right chromatids are orange. The chromosomes in the right-hand cell are mostly orange, but the lower regions of the left chromatids are green. Both cells have remnants of the mitotic spindle in the cytoplasm.

Figure 4: Telophase I results in the production of two nonidentical daughter cells, each of which has half the number of chromosomes of the original parent cell.

As the new chromosomes reach the spindle during telophase I, the cytoplasm organizes itself and divides in two. There are now two cells, and each cell contains half the number of chromosomes as the parent cell. In addition, the two daughter cells are not genetically identical to each other because of the recombination that occurred during prophase I (Figure 4).

You might be interested in
The president of the company__with the treasurer to steal the funds.
MatroZZZ [7]
The answer is 'colluded', because it means that they schemed to do it secretly. The other options aren't possible here, and most of them are adjectives, and you need a verb.
7 0
3 years ago
Pls help with this question
melisa1 [442]

can you take a picture so we can read the page 11

7 0
3 years ago
Read 2 more answers
In the 1820s, white women were trained for marriage
Tamiku [17]

While attending the local school near their home in Battenville, New York, the instructor refused to teach her long division. So for this reason, Anthony was negatively affected by this idea.

Who was Susan B. Anthony ?

American social reformer and women's rights advocate Susan B. Anthony was essential to the women's suffrage campaign. She gathered anti-slavery petitions when she was 17 years old. She was raised in a Quaker family that was dedicated to social equality. She was appointed the American Anti-Slavery Society's agent for the state of New York in 1856.

Anthony faced harsh criticism and accusations that she was attempting to undermine the institution of marriage when she initially started her crusade for women's rights. But during the course of her life, the public's view of her drastically shifted. President William McKinley invited her to the White House to commemorate her 80th birthday. When her likeness appeared on the 1979 dollar coin, she became the first American citizen to be represented on American money.

Learn more about Susan B. Anthony here-

brainly.com/question/14130938

#SPJ4

8 0
9 months ago
Whats the answer please
Yuki888 [10]

Answer:

C

Explanation:

3 0
3 years ago
An advantage of the case study method is that it
Arada [10]
They are efficient for rare diseases or diseases with a long latency period between exposure and disease manifestation.
3 0
3 years ago
Other questions:
  • Consider how Mrs. Whitaker is characterized in the story. What conclusions can you make about how she lives her life? Support yo
    11·1 answer
  • What techniques does the author of this passage use to create a sense of mystery and suspense?
    6·1 answer
  • The author makes an anology between woman being citizens without the right to vote and sitting in a row boat without any oars. w
    8·1 answer
  • What are the helping verbs in this sentence?
    15·2 answers
  • 1. What are the three main guidelines for writing? ____________________________________________________________ ________________
    6·1 answer
  • What is Julius Caesars nemesis in Julius Caesar?<br> (Nemesis- the main hero's tragic flaw)
    5·1 answer
  • “Our past, our present, and whatever remains of our future, absolutely depend on what we do now.”
    10·1 answer
  • Which propaganda technique does this passage use?
    14·2 answers
  • Denotation is a word’s __________ meaning, and connotation is a word’s __________ meaning.
    11·1 answer
  • Write one paragraph that presents your evaluation of the writer’s argument. The evaluation should include a thesis statement, a
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!