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 after meiosis II if one pair of homologous chromosomes experiences nondisjunction in meiosis I? Show how you got the answer by drawing out the process, starting with the diploid cell undergoing meiosis I (where nondisjunction occurs) and then meiosis II to get the four daughter cells.

Answers

Answer 1

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.

If A Cell Has A Diploid Number Of 8 (2n = 8) Before Meiosis, How Many Chromosomes Will Be In Each Of

Related Questions

overexploitation means​

Answers

Answer:

the action or fact of making excessive use of a resource.

Which of the following best describes the producers in a terrestrial food web?

A) They are at the top of the energy pyramid.
B) They obtain their energy from consumers.
C) They are unaffected by decomposers.
D) They convert energy from the sun to chemical energy.

Answers

Answer:

The correct answer is - D. They convert energy from the sun to chemical energy.

Explanation:

In any food web, producers are the organism that can make their own food and energy by converting light energy coming from the sun into chemical energy, this process called photosynthesis.

Normally producers are green plants. These are present at the bottom of the energy pyramid as these are the highest in the number. Consumers et energy from producers by feed on them.

What is the name of the organelle labeled with the letter A?
A
B
o
ה ס ד ה I
N
M
к
Animal cell

Answers

Answer:

the label letter A is lysosome

Can evolution happen to you PERSONALLY (in your lifetime)?

A. Yes I evolved from a baby to a teenager

B. No it happens over a whole generation

Answers

Answer:

B

Explanation:

Answer:

The answer is B

somebody pls pls help

Answers

Answer:

A

Explanation:

What is osmosis?
can someone explain this please

Answers

Answer:

it is the process by which water molecules passes through the semi-permeable membrane from a region of low concentration to a region of high concentration

22. What is the importance of cilia and flagella for
microorganisms?

Answers

Motile cilia use their rhythmic undulation to sweep away substances, as in clearing dirt, dust, micro-organisms and mucus, to prevent disease.

Why do many water animals not have a well developed blood system?​

Answers

The simplest animals, such as the sponges (Porifera) and rotifers (Rotifera), do not need a circulatory system because diffusion allows adequate exchange of water, nutrients, and waste, as well as dissolved gases. Instead, gases, nutrients, and wastes are exchanged by diffusion.

Answer:

Explanation:

The simplest animals, such as the sponges (Porifera) and rotifers (Rotifera), do not need a circulatory system because diffusion allows adequate exchange of water, nutrients, and waste, as well as dissolved gases. ... Instead, gases, nutrients, and wastes are exchanged by diffusion.

The diagram below represents the time a cell spends in the two main phases
of the cell cycle. In which phase does a cell spend less time?
A. Interphase
B. R phase
C. M phase
O
D. Prophase

Answers

The cell spends less time in the M phase, also known as the mitotic phase, where the actual division of the cell takes place.

What does happen during M phase?

During this phase, the cell undergoes mitosis or meiosis, depending on the type of cell, resulting in the formation of two daughter cells. In contrast, the interphase is the longest phase of the cell cycle, where the cell grows and carries out its normal metabolic activities.

The R phase, also known as the S phase, is a sub-phase of interphase where DNA replication occurs. Prophase is the first phase of mitosis and is relatively short compared to the M phase as a whole.

During prophase, the chromosomes condense, the nuclear envelope breaks down, and the spindle fibers form. In metaphase, the chromosomes align at the metaphase plate.

During anaphase, the sister chromatids separate and move towards the opposite poles. Finally, during telophase, the spindle fibers disassemble, the nuclear envelope reforms, and cytokinesis occurs, resulting in the division of the cytoplasm and formation of two identical daughter cells.

In terms of the amount of time spent in each phase, interphase is the longest, accounting for about 90% of the cell cycle. M phase, on the other hand, is relatively short, accounting for only about 10% of the cell cycle. Therefore, a cell spends less time in M phase than in interphase.

Learn more about mitotic phase at:

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Which of the following best represents the purpose of fertilizers?

Answers

Answer:

Fertilizer, natural or artificial substance containing the chemical elements that improve growth and productiveness of plants. Fertilizers enhance the natural fertility of the soil or replace the chemical elements taken from the soil by previous crops.

a nucleotide consists of?
A.a phosphates sugar and a nitrogen base
B.a sugar and a nitrogen base
C.a phosphate, an amino acid and a nitrogen base
D.a sugar, a protein and uracil

Answers

Answer:

a

Explanation:

a nucleotide consists of a phosphates sugar and nitrogen base.

What is the sequence of the mRNA that would be written during transcription of this piece of DNA?

Answers

Answer:

AUCUAG is the correct combination

Explanation:

replace every letter with its xorresponding base pair of mRNA where A=U, T=A , C=G

Which of the following processes takes place in the ribosomes of a cell?
O A. Transcription only
O B. Translation only
O C. Transcription and translation
O D. Replication only

Answers

Answer:

B.Translatiin only

Answer:

Option B Translation only

Explanation:

Please Mark me brainlist

Describe movement of molecules to maintain a healthy cell environment. Explain in details

Answers

Answer:

Very necessary for its survival.

Explanation:

Movement of molecules is very important to maintain a healthy cell environment because some molecules are required by the cell for its growth and development. Some molecules moves inside the cell environment through a semi-permeable membrane such as glucose, oxygen, potassium etc while on the other hand, some molecules are removed from the cell which are waste materials such as carbondioxide etc. If these waste materials are not removed from the cell, it greatly damaged the cell.

A structural protein collagen sometimes has a mutation that can causes a condition in which bones are weak and break easily. Which of the following are components (monomers) of collagen?
a. Amino acids

b.Nucleotides

c.Fatty acids

d.Carbohydrates

Answers

is fatty acids have good day

Darwin hypothesized that new species could appear gradually through small changes in an ancestral species. What experiment did he conduct to test this hypothesis?

Answers

Answer:

Darwin conducted an experiment with breeding pigeons.

Explanation:

The pigeons provided the perfect animal to test his theory of selection for quite a number of reasons including its trait diversity from wing structures to color patterns to size to flight patterns. From these experiments he concluded that by natural selection of randomly occurring traits that make species better suited for survival and reproduction, evolve in the astounding diversity of organisms on Earth today.

(not my words)

Answer:

its b

Explanation:

It's 58 degrees outside and a meteorologist says a cold front is headed to you area. What should you wear to prepare? *

sandals
rain jacket
snow jacket
hat and gloves

Answers

You should wear a hat and gloves to prepare for a cold front; the average cold front is about 45-50 degrees, which is cold but not freezing enough for a heavy jacket.

Hope that helps!
hat and gloves is the answer

What stage of photosynthesis uses
carbon dioxide to make glucose?
A. Light reactions
B. Calvin Cycle
C. ATP synthesis
D Cellular respiration

Answers

Answer:

light reaction because glucose is a factor of sugar.

Deforestation occurs when large Amounts of trees are cut down and not replaced which of the following would result from deforestation


A. Decrease carbon in the atmosphere
B. Increased carbon in the atmosphere

Answers

Answer:

The correct answer is (B).

Explanation:

Deforestation occurs when large Amounts of trees are cut down and not replaced, which of the following would result from deforestation...

Increased carbon in the atmosphere

This statement is true because when trees become less abundant, the amount of oxygen being released into the atmosphere by trees via photosynthesis.

The circumstance that would result from deforestation is the increased carbon in the atmosphere. Thus, the correct option is B.

What is Deforestation?

Deforestation may be defined as the process of cutting down or eliminating trees in large numbers from our surroundings. This activity generally happens due to industrialization, wood extraction, urbanization, etc.

When the number of trees remains less in the environment due to deforestation or any other activity, the level of carbon dioxide in the atmosphere typically rises.

This is because carbon dioxide is considered the reactant of photosynthesis that is utilized by the plants along with water in the presence of sunlight and converted into oxygen.

But when the number of plants decreases, the level of carbon in the atmosphere increases, and the level of oxygen in the atmosphere decreases.

Therefore, the circumstance that would result from deforestation is the increased carbon in the atmosphere. Thus, the correct option is B.

To learn more about Deforestation, refer to the link:

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I Need help with this question because I don't understand what to put

Answers

Answer:

https://www.nationalgeographic.org/article/hydrologic-cycle/#:~:text=The%20water%20cycle%20consists%20of,evaporation%2C%20condensation%2C%20and%20precipitation.&text=Evaporation%20is%20the%20process%20of,evaporates%20and%20becomes%20water%20vapor.&text=Water%20vapor%20is%20also%20an%20important%20greenhouse%20gas.

Explanation:

It’s asking you to start yourself off at one of the various stages that water goes through. You are to pretend to be a water molecule at one of those stages (your choice) and from there go through the whole cycle back to where you started. Basically it wants you to show the water cycle.

There are different versions of the water cycle depending on how complex they want it. The basic water cycle is collection, evaporation, condensation, precipitation (Note: do not put this as this answer if it’s a higher level course talking about other aspects of the cycle like run-off and transpiration).

Which of the following does NOT include a function of the cell membrane? *

It allows the cell to interact with and sense the external environment.
It controls what enters and exits the cell.
It helps the cell maintain homeostasis.
It provides energy for the cell in the form of ATP.

Answers

It provides energy for the cell in the form of ATP.

Mitochondria does that.

How do the treatment and control of an inherited disease?​

Answers

With gene therapy, the treatment or elimination of inherited diseases or physical conditions could become a reality. Gene therapy involves the manipulation of genes to fight or prevent diseases. Put simply, it introduces a "good" gene into a person who has a disease caused by a "bad" gene.

8. Which observation would be the best evidence to use to argue that there is an evolutionary relationship between two species?

They occupy the same niche.

They have similar fur color.

They have similar DNA base sequences.

They inhabit the same geographic regions.​

Answers

Answer: C: They have similar DNA base sequences

Explanation:

Why didn’t Darwin understand that genetics has passed on.

Answers

Answer:

Darwin did not know that DNA would become an important part of his Theory of Evolution. In fact, the subcategory of evolution called microevolution is completely based on DNA and the mechanism of how genetic information is passed down from parents to offspring.

Explanation:

DARWIN'S DIFFICULTIES WITH BLENDING INHERITANCE AND HIS THEORY OF PANGENESIS. Darwin failed to understand the significance of these results because he had no model of particulate inheritance that could be applied to genetic data.

Why do animals that are active at night tend to have trouble seeing in color?

Answers

Nocturnal animals have more rod cells in their eyes as compared to humans and other animals active during the day. These rod cells serve as light receptors and help them see in dim light.

For every action or force
in nature, there is an equal
and opposite reaction.

Answers

Answer:

Newton's Third Law of Motion

Explanation:

Newton's third law of motion states that any object that has a force applied to will react in the opposite direction

Hope It Helps you!!

In which ocean's zone would you expect to see the
ecosystem shown?
the open ocean
the intertidal zone
the benthic zone
the neritic zone
zone?

Answers

Answer:

La zona intermareal

Explanation:

Por que en la información del texto

Answer:

Intertidal zone

Explanation:

I took the assigment :)

In a food web, which type of organism receives energy from the other three types?
A)producer
B)carnivore
C)decomposer
D)herbivore

Answers

Answer:

C decomposer

Explanation:

decomposers get their energy from dead animals so there at the end of the tree, meaning they get there energy off the other tree groups.

PLZZZZZZZZ HELPPPP!
What is an example of an event that can compromise an ecosystem?
1.seasonal climate change
2.seasonal dry period
3.d eveloping land around cities
4.high temperatures

Answers

Answer: Seasonal climate change

Explanation:

Answer:

1. Seasonal climate change

Explanation:

oh, and can you please talk to Miracle, she needs a lot of help right now since her grandma passed away

1 a
Starting with the mouth, list the structures that air passes through in order for oxygen
to be absorbed by a red blood cell.
red
blood
cell
mouth
tracheal​

Answers

Answer:

The nostrils, nasal cavity, pharynx, larynx, trachea, bronchi and bronchioles.

Explanation:

The air enters to the mouth and passes through nostrils, nasal cavity, pharynx, larynx, trachea, bronchi and bronchioles and finally reaches alveoli where the exchange of gases such as carbondioxide and oxygen. The hemoglobin takes carbondioxide gas from the cells that are present all over body to the lungs. Their this carbondioxide gas is removed from the hemoglobin and absorb oxygen. This carbondioxide gas is releases from the body on the same pathway but reverse in direction.

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