Why does DNA replication only happen once during meiosis?

Answers

Answer 1
DNA replication only happens during meiosis because the chromosome number of the species remains the same from one generation to the next, the chromosome number of germ cells must be reduced by half during meiosis. To achieve this feat, meiosis, unlike mitosis involves a single round of DNA replication followed by two rounds of cell division.

Related Questions

8.4 waves go by in 6.875 seconds. Calculate the frequency (per 1 second)

Answers

Answer:

Hi

Explanation:

Ok

:-) :-) :-) :-) :-) :-) :-) :-) :-)

Answers

Answer: irregular,inconsistent, unsteady, uneven, shaky, fitful, patchy, variable, varying, changeable, changing, ever-changing, on-and-off, off-and-on, inconstant, erratic, haphazard, unstable, unsettled, spasmodic, sporadic, episodic, intermittent, occasional, unpunctual, wavering, fluctuating, aperiodic, unsystematic, unmethodical, ...

Proceed though meiosis to anaphase 1 . Which chromosomes went up and which went down?

Up : Down : ​

Answers

Answer:

The upper chromosomes went up and lower chromosomes went down.

Explanation:

Anaphase 1 of meiosis, the chromosomes that are present at the upper side went up and move towards the pole while on the other hand, the chromosomes which are located at the lower side went down moves toward another pole. Both chromosomes remain attached to one another in anaphase 1 while in telophase I, the chromosomes arrive at opposite poles of the cell.

what variables does this graph display? Be specific about each variable

Answers

The graph displays a positive line going up at a constant rate of population over six years.

What is some things the same about mars and Saturn

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Answer:

One possible similarity, though, is rings. Saturn is encircled by wide, beautiful rings. Mars doesn’t have any rings today, but it could have had them in the distant past — and might again millions of years in the future.

Explanation:

BIOLOGY
The wing of a bat and the wing of a bee or other insect are examples of what type of structures?

a. analogous structures
b. homologous structures
c. vestigial structures
d. unrelated structures

Answers

Answer:

a similar function diff phylum

what is a chemical adaptation

Answers

Answer:

Explanation: Given a set of conditions, molecules in an open system tend to self-organize so as to minimize the overall free energy. This is chemical adaptation. hope this helps :D

A change within the body (hormone function) changes your normal behavior.

Which are the main categories of the physical science?
A) Medicine, biotechnology, genetics and pharmacology
B) Chemistry, physics, astronomy, and earth science
C) Mathematics, statistics, logic and computer science
D) Biology, paleontology, biochemistry, and zoology

Answers

Answer:

b

Explanation:

physical science has to do with inorganic things(non living) or un-biological things

C) mathematics, statistics etc

Which model is to scale? *
2 points
A
B
Model A
Model B.
Both models are to scale

Answers

Answer:

I thibk it might be a or b bc those oare the only answers to pick from LOL

Which equation would be used to calculate height for a African American
female radius?
3.79(radius) + 79.42
4.74(radius) + 54.93
3.67 (radius) + 71.79
3.78 (radius) +74.70
3.32 (radius) + 85,43

Answers

Answer:

3.78

Explanation:

because in that the height was changed so that it has a radius number 3.78(radius)74.70

construct a process by which rocks may change forms. Rock melts. Sediments deposit into a basin. Magma cools and solidifies underground. Weathering occurs. Intrusive igneous rock forms. Sedimentary rock forms.

Answers

Answer:

Las rocas ígneas (del latín ignis, fuego)  también nombradas magmáticas, son todas aquellas que se han formado por solidificación de un de material rocoso, caliente y móvil denominado magma; este proceso, llamado cristalización, resulta del enfriamiento de los minerales y del entrelazamiento de sus partículas. Este tipo de rocas también son formadas por la acumulación y consolidación de lava, palabra que se utiliza para un magma que se enfría en la superficie al ser expulsado por los volcanes.

Cuando la solidificación del magma se produce en el seno de la litósfera, la roca resultante se denomina plutónica o intrusiva; si el enfriamiento se produce, al menos en parte, en la superficie o a escasa profundidad, la roca resultante se denomina volcánica o extrusiva y estos, a su vez, se subdividen en familias a partir delas diferentes texturas, asociaciones minerales y modo de ocurrencia. Las formas que adoptan los cuerpos ígneos durante su cristalización delimitan diferentes estructuras ígneas.

Existen diversos criterios para clasificar una roca ígnea, cada uno de ellos con objetivos definidos, como la ocurrencia de las rocas, el tamaño de grano, la textura y estructura, el contenido mineral o la composición química.

Rocas ígneas intrusivas o plutónicas

Son rocas formadas en el interior de la corteza terrestre. Cuando un magma se enfría bajo la superficie lo hace más lentamente, permitiendo un mejor desarrollo de los cristales, que debido a eso alcanzan tamaños que pueden ser observados a simple vista, generalmente abarcan grandes extensiones de terreno y llegan a la superficie terrestre mediante procesos orogénicos (deformaciones tectónicas) o mediante procesos externos de erosión. Dentro de este tipo de rocas, algunos autores reconocen una clase intermedia, la hipoabisal, que incluye a las rocas que han cristalizado a una profundidad moderada y se presentan en forma de filones o diques, rellenando grietas; son mucho menos abundantes que las plutónicas y se encuentran casi siempre asociadas a ellas.

Explanation:

The process of rocks undergoing change includes :

1. Sedimentary rock forms2. Sediments are transported by water.3. Sediments are deposited in a basin.4. Lithification takes place.5. Weathering occurs.6. The rocks are exposed to extreme heat and pressure.7. Rock melts.8. Magma cools and solidified underground.9. Intrusive igneous rocks form.What is a rock cycle?

The rock cycle shows us the formation and changes in the nature of the rocks on the surface of the earth and how thet igneous rocks convert into the sediembtary rocks.

How they get transformed into the metamorphic rocks and there but later get recycled back into the igneous type. The rock cycle is thus a dynmaic sequence of the rocks etting trnaofed form one to another.

Find out more information about the rock cycle.

brainly.com/question/341596.

(10 points)What did meteorites bring to primitive Earth?

a
bacteria

b
viruses

c
primitive cells

d
inorganic materials

Answers

Answer: The correct option is A.

Bacteria

Explanation:

This is because group of scientist found or discovered that bacteria were found on the fossils of meteorited which originate from Mars and became primitive the Earth. It was discovered that the bacteria were originated from Mars and not native of the Earth.

Meteriotes are small solid debris that actually originated from asteroids, from outer space and find it way to the atmosphere.

Which is the best description of Earth’s sun?

1. The sun is an average size star in terms of size, temperature, and age.,

2. The sun is the glowing remains of an older, dying star.

3. The sun is a collection of stars held together by gravity.

4. The sun is a red giant that will soon become a black dwarf star.

Answers

I think it might be the third option but I’m not sure

Answer:

The answer's three

Explanation:

Help Help Help giving it’s a semester test Based on the pedigree diagram who must be heterozygous for the trait A the child with the trait B both parent C the child without the trait D only one parent

Answers

Answer:

Pretty sure its B

Explanation:

Answer:

the child with the trait i just did it on the exam

Which statement about identical twins and fraternal twins is correct in regards to DNA?
A. Identical twins have different DNA, and fraternal twins have different DNA.
B. Fraternal twins share the exact same DNA, but identical twins do not.
C. Identical twins and fraternal twins share the exact same DNA.
D. Identical twins share the exact same DNA, but fraternal twins do not.

Answers

Answer:

D. Identical twins share the exact same DNA, but fraternal twins do not.

Explanation:

Identical twins are the twins formed from one egg provided by their mother and one sperm provided by their father. In contrast, fraternal twins are formed from two different sperms and two different eggs from the same father and mother.

Due to the fact that identical twins are as a result of one fertilized egg dividing into two, they share the same exact DNA. On the other hand, fraternal twins do not share the same exact DNA because they are formed from separate eggs and separate sperms.

Answer:

d

Explanation:

just took test

PLEASE HURRYY
9. Mendel’s research led to several conclusions about how traits are passed through generations. Choose TWO of the conclusions from the bullet list below and provide evidence from THIS activity that supports this conclusion. (6 points)

Different forms of a gene account for variations in the inherited traits

An organism inherits two genes for each trait, one from each parent.

Some alleles are dominant over others for a given trait.

The two genes of a given trait segregate during gamete production.



#1)

Which conclusion from the list above did you pick? _________________________________________________

How does it apply to the monsters activity?



#2)

Which conclusion from the list above did you pick? _________________________________________________

Answers

Answer:

NOT:for an organism inherits two genes one from each parent

the reason is because each parent give 23 genes meaning that The second choice is out of the ring basically what I am saying is the answers are:      

• Some alleles are dominant over others for a given trait.

The two genes of a given trait segregate during gamete production.

Help me Please! Choose one answer!

1.) Many organisms look the same for the first few stages of development, which makes it appear that all organisms came from a common ancestor.

A.) Embryology
B.) Vestigial Structures
C.) Homologous Structures
D.) Fossil Record

Answers

Answer:

A

Explanation:

Answer:

A

Explanation:

These shared features suggest that all living things are descended from a common ancestor, and that this ancestor had DNA as its genetic material, used the genetic code, and expressed its genes by transcription and translation.

Anyone ??? this is a timed test

Answers

Answer:

Are the genetically modified plants potentially harmful to humans due to exposure to heavy chemical sprays?

Explanation:

pls I am on a timer tysm

Answers

Answer:

from insidee to outside.

Plants grow leaves in order to...
a) help them grow taller.
b) protect the plant from insects.
c) get energy from photosynthesis.
d) help with reproduction.

Answers

Answer:

c) get energy from photosynthesisexplanation:

Leaves play an important role in the life of the plant, providing the means to collect and store sunlight for photosynthesis.

HELPPPP!!! ASAPPPPP!!!

Which of the following includes an example of each type of symmetry and asymmetry?
jellyfish, sea anemones, and sponges
sponges, jellyfish, and turtles
turtles, jellyfish, and pelicans
sponges, pelicans, and turtles

Answers

Answer:

option A IS THE ANSWER : jellyfish, sea anemones, and sponges

Explanation:

IF IT IS CORRECT PLEASE MARK AS BRAINLIEST

The option that includes an example of each type of symmetry and asymmetry is jellyfish, sea anemones, and sponges. Thus, the correct option for this question is A.

What is Symmetry?

In biological science, symmetry may be defined as the repetition of the parts in an animal or plant in an orderly fashion. It refers to a correspondence of body parts, in size, shape, and relative position, on opposite sides of a dividing line or distributed around a central point or axis.

There are four types of symmetry that occur among animals: spherical, radial, biradial, and bilateral. While Asymmetry means the absence of symmetry as the body of the organism cannot be divided into parts along any one plane. Jellyfish and sea anemones possess radial symmetry.

Therefore, jellyfish, sea anemones, and sponges represent an option that includes an example of each type of symmetry and asymmetry.

To learn more about Symmetry, refer to the link:

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What is a sensory system?

Answers

The sensory nervous system is a part of the nervous system responsible for processing sensory information. A sensory system consists of sensory neurons, neural pathways, and parts of the brain involved in sensory perception.

9th grade biology question. 10pts

Answers

Answer:

Molecule A

Explanation:

C6H12O6 is an organic comound

Also known as GLUCOSE

The molecule that can be classified as is molecule A?

PLS HELP ASAP I NEED IT I WILL MARK BRAINLIEST
When two molecules of glucose (C6H12O6) are combined to form a molecule of maltose (C12H22O11), the formula of the maltose molecule is not C12H24O12 because __________ is formed in this reaction.

Answers

Answer:

water(H2O)

Explanation:

2C6H12O6-->C12H22O11+H2O

you can see that the difference between C12H24O12 and C12H22O11 is 2hydrogen atoms and an oxygen atom which are found in the water molecule also through hydrolysis you can bring that molecule of water back and restore two molecules of glucose

C12H22O11+H2O-->2C6H12O6

A Muscle cells require large amounts of energy and therefore have large numbers of organelles called​

Answers

The organelle in muscle cells contain mitochondria which is the cells power plant and converts nutrients into atp which stores energy

how do the reactant molecules become the molecules found in the products... what happens to them ​

Answers

Explanation:

Molecules of reactants and products undergoes chemical changes when they combine.

The combination leads to the breaking of bonds and rearrangement and this brings about the formation of new products.

Atoms in molecules tends towards stabilityThey often want to mimic the noble gases and would keep rearranging until stability is attained. This leads to the formation of new compounds in the product end of the reaction.

carbohydrates
carbon dioxide
usable chemical energy
water
dah
Geocod
drag and drop and her
g and died
OXYGEN

Answers

Answer:

what is the question you are asking

Explanation:

Answer:

Carbohydrates-fruits and wheat bread

Water-Rain drop

Carbon dioxide-cloud

ATP-usable chemical energy

Explanation: I take biology class and I’m doing a this for a test now,

In order for protein synthesis to occur, both transcription and translation must occur. Which of the following statements describes the difference between transcription and translation?


In transcription, the genetic code of a DNA molecule is encoded. Translation is the process of converting the DNA code into a code that RNA can use.


In transcription, an amino acid chain is encoded in a DNA molecule. Translation is the process of turning the amino acids into nucleic acids in an RNA molecule.


In transcription, a double helix DNA molecule is split into two separate single strands. Translation is the process of joining each single DNA strand with a single strand of matching RNA.


In transcription, the genetic code of a DNA molecule is transferred to a messenger RNA molecule. Translation is the process of creating an amino acid chain using the encoded messenger RNA.

Answers

Answer:

1

Explanation:

In transcription, the genetic code of a DNA molecule is transferred to a messenger RNA molecule. The translation is the process of creating an amino acid chain by using the encoded messenger RNA. So the correct option is D.

What are transcription and translation?

The first step in the process of gene expression is called transcription. In this process, the DNA sequence of a gene is copied for the formation of an RNA molecule.

RNA polymerase enzymes link the nucleotides of DNA to form an RNA strand. The DNA strand is the template. For every gene in the genome, transcription is separately controlled.

The translation is the process by which an mRNA molecule encodes for a protein. The process of translation happens with the help of tRNA in the ribosomes.

Translation requires ATP which is produced by the tRNA. The tRNA in the ribosomes supplies energy to RNA for the transcription of proteins The entry of mRNA occurs by the smaller subunit of RNA and the amino acid chain extends from the larger subunit.

Therefore the correct option is D.

Read more about translation and transcription, here

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All of the following make up the three major categories of environmental problems except *
loss of biodiversity.
resource depletion.
overpopulation.
pollution.

Answers

loss of biodiversity is not among the three major categories of environmental problems.

What are environmental problems?

Environmental problems are the results of human activities on the biophysical environment, most frequently negative consequences that lead to the degradation of the ecosystem.

They are negative impacts of human activities on the environment. These include environmental issues including pollution, population growth, waste management, and the greenhouse effect, among others.

To achieve a balance between man and the environment, many environmental protection measures are being implemented at the individual, organizational, and governmental levels. Making use of reusable items instead of disposal ones is one of the solutions to environmental issues.

Learn about environmental issues here https://brainly.com/question/7161493

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Be Alert to Impersonators. ...
Safely Dispose of Personal Information. ...
Encrypt Your Data. ...
Keep Passwords Private. ...
Don't Overshare on Social Networking Sites. ...
Use Security Software. ...
Avoid Phishing Emails. ...
Be Wise About Wi-Fi.

Answers

Answer: Thanks for the tips.

Explanation:

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