Câu 6: Gà có 2n =78. Vào kỳ trung gian, sau khi xảy ra tự nhân đôi, số nhiễm sắc thể trong mỗi tế bào là:
A. 78 NST đơn. B. 78 NST kép. C. 156 NST đơn. D. 156 NST kép.

Câu 7: Ở người (2n = 46), số NST trong 1 tế bào tại kì giữa của nguyên phân là:
A. 23 NST đơn. B. 46 NST kép. C. 46 NST đơn. D. 23 NST kép.

Câu 8: Ở ruồi giấm, có bộ NST 2n = 8 vào kỳ sau của nguyên phân trong một tế bào có:
A. 8 NST đơn. B. 16 NST đơn. C. 8 NST kép. D. 16 NST kép.

Answers

Answer 1

Answer: 6A 7D 8B

Explanation:


Related Questions

50 points and brainliest
Drag each tile to the correct box. Not all tiles will be used.
Mitosis is a type of cell division. Organize the images below to show the steps of mitosis.

Answers

Answer:

The lesson provided all the information, and I got a 100%

Explanation:

Which of the following is an example of an adaption?

A: Wolves work together to catch prey
B: A dog walks without pulling on its leash
C: Ducks swim near the shore by a picnic area, where food is always available
D: Birds living near a highway learn not to fly away every time a car passes

Answers

Answer:

D

They are adapting to their environment to increase chances of survival.

In response to a threat, we perspire, breathe more quickly, get goose bumps, and feel nauseated. These responses are:

Answers

Answer: sympathetic nervous system

Explanation: because it is the body's rapid involuntary response to dangerous or stressful situations.

Goosebumps are a symptom of a seizure illness termed temporal lobe epilepsy, a sympathetic nervous system disorder, or other brain disorders, albeit they are uncommon. They are also common with heroin or other drug withdrawal.

What cause goose bumps, and feel nauseated in body?

The body's quick automatic reaction to hazardous or stressful circumstances is controlled by the sympathetic nervous system.A quick hormone rush raises the body's alertness and heart rate, which boosts the flow of blood to the muscles.

Therefore, In response to a threat, we perspire, breathe more quickly, get goose bumps, and feel nauseated. These responses are Sympathetic nervous system because it is the body's rapid involuntary response to dangerous or stressful situations.

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can somebody help me with this worksheet please!?

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A test cross performed between the individual with unkown genotype and the h0m0zyg0us recessive individual. 9) hh. 10) Hh or HH. 11) HH x hh. 12) 100% Hh. 13) Hh x  hh. 14) 50%Hh and 50% hh. 15) -16) in the text.

-----------------------------------

Available data:Single diallelic gene codes for hair in Guinea pigsAllele H is dominant and codes for having hairAllele h is recessive and codes for not having hair

For this gene we will assume complete dominance, meaning that the dominant alele completely hides the expression of the recessive allele.

According to this information, we can say that

Genotype      Phenotype

HH                  Hairy pig

Hh                   Hairy pig

hh                   Hairless pig

9) Geneviene does not have hair  ⇒  Its genotype is hh

10) Fred has hair ⇒ Its genotype is HH or Hh

Possible crosses

11 and 12)

Cross1: If Fred was genotype HH and bred with Genevieve

Parentals) HH    x    hh

Gametes)   H   H    h    h

Punnett square)    H    H

                        h   Hh   Hh

                        h   Hh   Hh

F1) 100% of the progeny is expected to have hair and be heter0zyg0us, Hh.

13 and 14)

Cross2: If Fred was genotype Hh and bred with Genevieve

Parentals) Hh    x    hh

Gametes)   H   hh    h    h

Punnett square)    H    h

                        h   Hh   hh

                        h   Hh   hh

F1) 50% of the progeny is expected to have hair and be heter0zyg0us, Hh.

     50% of the progeny is expected to be hairless and be h0m0zyg0us recessive, hh.

15)  

• If the individual with the unknown genotype (Fred) is heter0zyg0us, the phenotypic rate of the descendants is 50% heter0zyg0us -Hh- and 50% h0m0zyg0us recessive -hh-.

• But if the individual with the unknown genotype is h0m0zyg0us dominant, the phenotypic rate of the descendants is 100% heter0zyg0us for the trait, Hh.  

16)

The weakness is that even if Fred is heter0zyg0us for the trait, when making the cross it might occur that all individuals in the progeny are born h0m0zyg0us recessive, and there is a risk of missinterpreting the results.

So in that situation, many crosses must be done between fred and genevieve to se sure about Freds genotype.

-------------------------------------------------

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how is the magnetic field of a magnet represented ?

first to answer gets brainliest!​

Answers

Answer:

Continuous lines of force/magnetic flux

Cell Type
Root hair cell from a plant
Water
25. Complete the chart by describing the function and structure in each cell.
Function
Structural adaptation(s) that enable
the cell to carry out its function.
Un
Soil particles

Answers

Answer:

[tex][tex]\purple{\rule{45pt}{7pt}}\purple{\rule{45pt}{999999pt}}[tex][/tex]

Because they have a wide surface area to speed up absorption, root hair cells are designed to absorb water and mineral ions.

What is the role of root hair cells in plants?

Plants are anchored by root hairs that emerge from the surface of the soil and take up water and minerals.

Vascular tissue in the heart of the root transports food produced in the leaves to the root, while transporting water and minerals away from it.

Its main purposes include anchoring the plant, absorbing water and dissolved minerals and transferring them to the stem, as well as storing reserve food.

Water and nutrients are mostly taken up by root hairs from the rhizosphere.

Therefore, root hair cell have large surface area that enable the cell to carry out its function.

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I don’t know how to do this. Help me please

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here is how to do it! if you have any questions feel free to ask in the comments :)

What is this diagram?

Answers

Answer:

This Diagram is of Plant cell and Animal cell...✌

Hope it helps u...

What is the function of the organelles that are labeled F? plant cell

Answers

Answer:

endoplasmic reticulum ( ER)

Explanation:

edg im guessing

a main difference between a scientific theory and a hypothesis is that?

Answers

Answer:

scientific theory needs proof and strong proof like its needs to solve some other problems related to this..

hypothesis is just like imaginary theory which may be sure but not clear like parell universe

Please answer ! Best answers will be marked as brainliest and will be given thanks and 5 stars , Any unnecessary answer , will be deleted and will hack your points.

Answers

Answer:

A. Northern tropic, equator, Southern tropic (I think Im not double sure)

B. Because the sun's rays hit the earth's surface at a higher angle at the equator

C. If earth did not tilt and orbited in an upright position around the sun, there would be minor variations in temperatures and precipitation throughout each year as Earth moves slightly closer and farther away from the sun

D. It is the right distance from the Sun, it is protected from harmful solar radiation by its magnetic field, it is kept warm by an insulating atmosphere, and it has the right chemical ingredients for life, including water and carbon.

Explanation: hope it helps love :)

Black eyes (B) are dominant to red eyes (b) in mice. Use a Punnett square to cross two heterozygous parents. What are the possible genotypes?
A. bb
B. BB and Bb
C. BB, Bb, and bb
D. Bb and bb

Answers

C.- BB, Bb, bb
if you need a visual i attached a pic

2. A sugar, a phosphate group, and a nitrogen base form the building blocks of which macromolecule?
a) Carbohydrates
b) Lipids
c) Nucleic Acids
d) Proteins

Answers

Answer:

c) Nucleic acids

Explanation:

Because DNA has those components

what does it mean for a bacteria or protist to be photosynthetic?

Answers

Answer:

Because we know that photosynthesis is a process that plants use, we can define photosynthetic protists as 'plant-like' protists that get their nutrients by converting sunlight into energy using photosynthesis.

Explanation:

Photosynthetic organisms, also known as photoautotrophs, are organisms that are capable of photosynthesis. Some of these organisms include higher plants, some protists , and bacteria because we know that photosynthesis is a process that plants use, we can define photosynthetic protists as 'plant-like' protists that get their nutrients by converting sunlight into energy using photosynthesis.Protists can be photosynthetic or heterotrophs (organisms that seek outside sources of food in the form of organic material). They also contain chlorophyll, a pigment which absorbs light energy for photosynthesis. Photosynthetic protists are considered plant-like protists.

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5. Viruses are not cells, nor are they made of cells. They also cannot
reproduce without another living cell. Which statement about viruses
is true?
A. viruses do not have a nucleus
C. virus are made up of tissues
B. viruses are multicellular
D. viruses are made up of organs

Answers

Answer:

B

Explanation:

... I think :] it could also be D

differentiate between middle and inner part of ear

Answers

Answer:

middle= This is the part through which sound travel inside the ear to the eardrum through the auditory canal . sound causes the eardrum nad it's tiny attached bones in the middle portion of the vibration and conducted to the nearby cochlea

inner part= the cochlea is the part of the inner ear . its main function is to transform sound into nerve impulses......

What are Chromatids in biology

Answers

Answer:

A chromatid is one of two identical halves of a replicated chromosome. During cell division, the chromosomes first replicate so that each daughter cell receives a complete set of chromosomes.

Explanation:

when a tautomeric shift occurs, what is true about the resulting mutation?

Answers

When a tautomeric shift occurs, then the resulting mutation ALWAYS changes a purine to a purine or a pyrimidine to a pyrimidine. A tautomeric shift may lead to a point mutation.

A mutation is any alteration in the nucleotide (DNA) sequence of the genome of an individual.

A tautomeric shift can be defined as a temporary change in the nucleotide base structure.

A transition mutation is a point mutation of one purine or pyrimidine base pair to the other purine/pyrimidine that occurs when one nucleotide base undergoes a tautomeric shift during DNA replication.

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Explain the "air-sea gas exchange" and what gases are involved.

Answers

Answer:

Air-sea exchange is a physio-chemical process and is important for the cycling of gases such as carbon dioxide, methane, nitrous oxide, dimethylsulfide and ammonia

Can anyone please help me

Answers

Answer:

because there is no essential conditions like water ,air,ect

Deserts often lack a large amount of sediment, making it hard for fossils to become buried in the ground.

Please help!! Multiple choice.

Answers

Answer:

Okazki fragments are pieces that are replicated on the discontinuous strand.

these diverticula are lined with transitional cell epithelium.

Answers

Answer:

calyceal diverticula

Explanation:

there is no explanation

what is the solid obtained at the neck of a funnel in sublimation?

Answers

Answer:

Sublimation is conversion of solid of vapors on heating and vapors to solid on cooling. The solid which undergoes sublimation is called sublime, whereas the solid obtained by cooling vapors is called sublimate.

Please help, i'm failing biology and REALLY need honest answers.
( DNA unit test, unit 6 lesson 13. CONNEXUS )

How are new viruses made?(1 point)

A. asexual reproduction

B. sexual reproduction

C. viral DNA or RNA copied by viral cells

D. viral DNA or RNA copied by a host cell

Answers

Answer: i’m pretty sure it’s C

Explanation:

C
Please mark as brainlest so I can rank up

Clusters of ganglionic sympathetic neurons that innervate organs in the abdominopelvic region are called ________ ganglia.

Answers

Clusters of ganglionic sympathetic neurons that innervate organs in the abdominopelvic region are called ______ ganglia. A) intramural. B) collateral? Answer: Your Answer is going to be A! :D Happy Early Christmas!!! :D (!It Might be B but I don't know I think it's A!)

Explanation: Clusters of ganglionic sympathetic neurons that innervate organs in the abdominopelvic region are called Intramural ganglia!!! Hope This Helps! Happy Early Christmas! :D

help pls anyone i need help apreciated

Answers

Answer:

wetlands

Explanation:

because wetlands

19. An ectotherm is also called a a. thermoregulator. b. thermoconformer. c. homeotherm. d. poikilotherm.

Answers

Answer:

An ectotherm can also be called a Poikilotherm.

:)

Mountain chains in northern Europe and West Africa match the Appalachian Mountains in terms of their ages and the sequences of rock layers that make them up. in 3-5 sentences analyze these observations and explain what conclusions can be drawn from them.​

Answers

The above observation shows that the mountain chains in Northern Europe and West Africa are part of the Appalachian Mountains as a result of the same age, matching of rocks, etc

A mountain chain simply means a row of high mountain summits or a contiguous ridge of mountains within a larger mountain range.

The theory of plate tectonics establishes a co-relation with these mountain chains by understanding their movements. It was shown that Europe and Africa were part of the same landmass in the past. Due to the gradual movement of plates, both continents move apart.

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During cellular respiration, cells convert oxygen and glucose into carbon dioxide, water, and energy. How is this process related to that of photosynthesis?

A. The products of photosynthesis are the reactants of cellular respiration.

B. In photosynthesis, cells use ATP to convert insulin into glucose and carbon dioxide
C. In photosynthesis, oxygen is inhaled, and carbon dioxide and water are exhaled.

D. Both photosynthesis and cellular respiration occur in a cell's mitochondria.

Answers

A. the products of photosynthesis are the reactants of cellular respiration

Which reactanat makes cellular respiration more efficient than fermentation when making ATP?

a
Oxygen
b
Glucose
c
Water
d
Carbon Dioxide

Answers

Answer: glucose I think?

Explanation: I’m not sure but it should be more efficient.

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