For her science fair project, your little sister replicated one of Mendel's experiments. From a P0 pea plant with purple flowers and a pea plant with white flowers, she got 1 purple F1 hybrid (she had forgotten to water, so just one survived). From this self-fertilized F1 she got 8 F2 offspring. 7 were purple and 1 was white, for a 7:1 ratio. Did your little sister just disprove Mendel's laws
Answer: No, the 7:1 ratio is close to the expected 6:2 ratio even with the limited sample size.
Explanation:
Let the alleles be P (purple) and W (white).
The possible crosses are
PP x WW, PP x PW, PW x WW, PW x PW
the F1 is PP or PW
one F2 is white so the F1 must be PW and
the F2 are PP, WW, PW and
the expected 8 progeny are 2PP, 2WW, 4PW
Because 7/8 are purple, we can infer that P is dominant and W recessive, so the expectation is 6 purple, 2 white
The observed ratio is similar to the expected ratio, so we can’t say that this result disproves Mendel, particularly with a small sample.
7:1 is close to 6:2, even if the sample is smaller. We cannot invalidate Mendel with such a small sample size because the observed ratio was not statistically different from the anticipated ratio.
What is Mendelian Ratio?The term "Mendelian inheritance" refers to specific patterns that can be observed in the way characteristics are passed down from parents to children. In the 19th century, the Austrian monk Gregor Mendel conducted thousands of tests with pea plants in order to develop these broad patterns. He did this in order to determine the genetic makeup of pea plants.
The frequency with which diverse phenotypes are produced as a result of any cross incorporating Mendelian traits. in particular, the three to one ratio that is displayed by the second generation of descendants from parents who are different from one another in regard to a single character.
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What are the three types of osmosis? What happens during each phase?
what are some of the limitations of science and scientists
Answer:
a major limitation would be funding for projects
What is direct characterization?
A.
when a character is described in detail by the author
B.
when a character is understood through dialogue
C.
when a character is revealed through another character’s thoughts and feelings
D.
when a character is revealed through his or her actions and appearance
Answer:
A
Explanation:
What are the characteristics of air masses?
Answer:
Air masses have fairly uniform temperature and moisture content in horizontal direction (but not uniform in vertical). Air masses are characterized by their temperature and humidity properties. The properties of air masses are determined by the the underlying surface properties where they originate.
Explanation:
is a gamete a brain cell
Answer:no it’s not a brain cell it’s part of the reproductive system I think
Explanation:
Explain why the world population is growing, even as the growth rate is decreasing.
First of all, you must understand that the average life span of a person is from 70 yrs. throughout the world. See (Picture 1). Life expectancy is measured by the average of each individual who have lived inside a nation or area. It then takes into account how long they live. Was there a ongoing war affecting that area? Was there pestilence, famine, or any natural disasters? These are some examples that would affect the population of a certain demographic, and can lead to people living longer or shorter, which in turn can fluctuate the total amount in the world population. In the case of a longevity of the race of humanity, there are many things to look at.
Firstly, the ever expanding usage of the ground to furbish the energy needed for the sustainability of life. One of the many necessities that a person must meet is having access to a stable source of food, as well as water. The first part comes in the form of gathering, or finding edible food while staying away from those that are harmful. This typically came in a trial-and-error format, and gave those who survived a broader knowledge of what can be eaten, and what cannot be. The second part is the advancement of tools such as spears using flint rock, or forging of sharp wooden staves that can be used to hunt game or fish. Furbishing of meat into the diet led to people generally having more muscle strength, as well as as well as retaining muscle mass, building stronger bones and absorbing iron much more better, which is essential in blood production. Whenever there is a large and stable source of food, as well as later having a globalization trading effort, the world population would grow. Stability almost always lead to higher population growth.
Secondly, the practition of medicine and advancement in the medical field. Medicine plays an important role in not only stabilizing the homeostasis of the body, but also to prescribe a positive role in preparing the human body to develop anti-bodies to counter any new diseases (to the individual) by giving doses of weakened traits. The usage of medicine and other ways in keeping a person healthy (such as sewage systems to drain away wastes full of germs), and the advancement of medicine to negate new diseases have allowed people to survive any incidents and live longer.
Thirdly, the stability of the world (as in wars). Having smaller wars, or little to no war can affect the stability of an economic, political, and social climate of a country. The more balanced and secure it is, the more a group is willing to have children in most cases. However, that is not too say that this means that the growth rate is increasing. Stability also brings, as studies would typically show, a typical mindset for people to make more money in their early adulthood in which case to save for the future. This means putting aside finding a family, or even having kids. Marrying later typically means that the usual ages of childbearing and rearing are on it's waning stages or have already passed, in which it means that the growth is slacking. However, remember the point that I brought up that people are living longer now. This means that the world population is expanding, but not because of new population, but because of the longevity of the old. (See Graph 2).
Finally, you must understand that growth rate as a whole is not as low as expected. The growth rate can be different from country to country. Countries that typically lean towards 2nd or 3rd world countries typically still have a larger growth rate. These generally account for the large amount of world population, even though as a general rule the growth rate is decreasing in most developed countries. Take a look at the graphs shown below (picture 3 & 4). The 3rd one shows the GDP as comparable to each individual countries, which in turn typically means if the country falls under which world category.
In the end, the World Population is made up of many different individual countries, in which each experience it's own growths or set backs in population sizes. One must also take into account the movement of people through countries (typically from developing to developed) in sustaining of other places. Also, one must take into account that not only stability, but also necessity would influence a persons decision to have children, which in turn would affect the growth rate. Advancement in providing the basic necessities and health services to a person would raise the longevity, which means that while not only the population is increasing, but that the population is leaning more towards the older side then younger. Finally, the world population has a peak in limit, and that once the limit is hit, the growth rate and roof would cave the population and lower it down, typically through diseases, famine, or other natural disasters.
Which mutation results in the production of molecules that can be used as a source of energy?
a mutation that causes bacteria to fight off antibiotics
a mutation that breaks down the sugar in milk, lactose
a mutation that changes the color of a part of a flower
Answer:
a mutation that breaks down the sugar in milk, lactose
Explanation: sugar that is broken down can be used as a source of energy
Answer:
The correct answer is B. a mutation that breaks down the sugar in milk, lactose
Which part of the carbon cycle occurs when plants, trees, or fossil fuels are burned?
A. Transpiration B. Oxidation C. Photosynthesis D. Combustion
Answer:
Combustion.
Explanation:
It's just as it sounds, combustion is the process of burning something. In the carbon cycle, combustion occurs whenever any organic living or non-living thing is burned in the proximity of oxygen, afterwards producing carbon dioxide.
Combustion is the part of the carbon cycle which occurs when plants, trees, or fossil fuels are burned. Thus, the correct option is D.
What is Combustion?Combustion or burning is a high-temperature exothermic redox chemical reaction which occurs between a fuel and an oxidant. The oxidant is usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke. This is one of the major reasons of pollution.
Three main types of combustion include rapid combustion, spontaneous combustion, and explosive combustion.
Therefore, the correct option is D.
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plsss What happens to the energy at each trophic level in an energy pyramid?
Answer:
A the first choice
Explanation:
Which of the following is not true of gravitational force? ( pls help me)
A noncontact
B depend on mass
C depend on speed
D depend on distance
Answer:
C) Depend on speed.
Explanation:
The proper function of many proteins is necessary for the proper functioning of cells.
O True
O False
Answer: True
Explanation:
The proper function of many proteins is necessary for the proper functioning of cells - True
Protein:Proteins are a class of macromolecules that perform a diverse range of functions for the cell.It helps repair and build your body's tissuesallows metabolic reactions to take place and coordinates bodily functions.In addition to providing your body with a structural frameworkproteins also maintain proper pH and fluid balanceThus, The proper function of many proteins is necessary for the proper functioning of cells - True
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Which two scientists proposed an atomic model with a nucleas
Answer:
Thomson and Rutherford
Explanation:
Answer:
Rutherford and Bohr
Explanation:
In one type of dog, black spots (B) are dominant over brown spots (b) and long tails (L) are dominant over short tails (l). Use the dihybrid cross for parents with the genotypes BBLI and BbLl and determine , the like hood of offspring with the genotype
List 3-5 important facts that highlight Gregor Mendel's work and contribution to genetics
Explain how DNA is semiconservation
What is the name of the theory of how the universe was created?
*Please Help*
The answer is The Big Bang Theory
PLEASE I WILL MARK BRAINLIEST WHOEVER ANSWERS FIRST
WORTH 30 POINTS
Answer:
the second one is 1, the first one is 3, the last one is 5, the fourth one is 2 and the third one is 4
Write a paragraph that explains the increase and how technologies that have appeared over
the past 100 years may have contributed to the increase or may have prevented more
significant increases in greenhouse gas levels.
Answer:
Mar 4, 2011 — Past changes in Earth's temperature happened very slowly, over ... Human activities contribute to global warming by increasing the greenhouse effect. ... Emissions of carbon dioxide, the most important greenhouse gas, ... Even slight rises in average global temperatures can have huge effects. ... 100 years.
Explanation:
5.
Which of the following is the most used form of renewable energy?
wind power
wood burning
biofuels
hydroelectric power
Answer:
hydroelectric power
Explanation:
Hydropower is the most widely-used renewable power source, with the global hydroelectric installed capacity exceeding 1,295GW, accounting for more than 18% of the world's total installed power generation capacity and more than 54% of the global renewable power generation capacity.
Answer:
hydroelectric power
Explanation:
*Ways we turn hydropower into energy we can use:
ways we can turn hydropower into energy: so one way were able to turn hydropower into energy is by using hydraulic turbines, using the turbine and mechanical energy the moving water spins a turbine and creates mechanical energy which is the converted into electricity.
The process usually takes place at hydropower plants, to tell you a bit more the falling water contains what we call kinetic energy which is what actually makes up the mechanical energy
The whole process takes place when water is released from a upper reservoir into the lower reservoir.
what are the products of photosynthesis
Answer:
glucose and oxygen
Explanation:
How fast can you answer correct..? How fast can i give you brainliest. Explain Your answer:D/ HELP//
Answer:
Well I was gonna say B
Explanation:
I didnt understand ur question if u thought it was D or if that was a smile face why u would smile but I'm going to say B because the bars on the grill are touching the food and transfering heat
The final stage of the cell cycle, during which the cytoplasm divides, is called * Telophase Mitosis O O Cytokinesis Prophase Interphase Metaphase Anaphase
The correct answer is cytokinesis it is the phase where the cytoplasm of the parent cell is separated into two .For example trough cleavage in animal cells.
Which type of communication occurs when the cells are touching? *
Answer:
Synaptic Signaling
Explanation:
In synaptic signaling, a nerve cell produces a neurotransmitter that diffuses across a synapse to a single cell that is almost touching the sender. The neurotransmitter stimulates the target cell. The transmission of a signal through the nervous system can also be considered an example of long-distance signaling.
Based on the weathering patterns, guess the rock type shown in each photo.
Answer:
Granite and sandstone
A scientist observed that during the course of a chemical reaction the number of ATP molecules were converted into ADP. What did the scientist most likely learn from the observation? a The reaction caused an output of energy. b The reaction produced water. c The reaction consumed water. d The reaction required an input of energy.
Answer:
a The reaction caused an output of energy
Explanation:
Adenosine triphosphate, commonly known as ADP, is an high-energy storage molecule in living cells. It stores and transfers needed energy for metabolic activities. ATP stores its energy in the bonds that hold the phosphate group in its structure. However, the energy is released for use during metabolic processes when the phosphate bond is broken, leading to the release of ADP molecule.
In this case, a scientist observed that during the course of a chemical reaction the number of ATP molecules were converted into ADP. This means that the reaction has caused ATP molecules to release its stored energy i.e. an energy output.
Neurons transmit signals to the central nervous system. The brain processes this information to initiate a response. Two neurons communicate with each other through the
. The
is released at the site to initiate action potential and carry the signal through the body.
Answer: there is no question to what your asking?
Explanation: there is nothing here that is being questioned
energy transfer through molecule to molecule contact is called?
Answer:
It's called conduction
Explanation:
By one week after conception, the multiplying cells have divided into outer cells enclosing a mass of inner cells. The inner cells will become the:
Answer:
By one week after conception, the multiplying cells have divided into outer cells enclosing a mass of inner cells. The inner cells will become the embryo.
Explanation:
By week one, the outer cells will give the trophoblast, which will later become the placenta, while the inner cells will form the embryoblast, which will become the embryo. Then the inner cells will be in one end, and in the other one, there would be the blastocele, which is a space with fluids. This process takes place in the fallopian tube and is part of the segmentation process.