To assess if an organism expressing a dominant characteristic is homozygous or heterozygous, a test cross can be used.
Back crosses are made between F1 generation plants and any of the parent plants, whereas test cross is made between F1 generation plants with dominant phenotypes and the homozygous recessive parent.
The phenotypes of the children can be used to identify the unknown genotype. If combining the recessive phenotype individual with the unknown dominant phenotype (PP or Pp genotype) results in solely dominant phenotypes (no recessive), then the unknown individual is homozygous dominant.
No matter if you are examining one gene or several genes, test crosses work on the same principle: you are pairing a person with a dominant phenotype but an unknown genotype with a person who is homozygous recessive for all relevant genes.
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Hello can someone help?
Im confused
Answer:
Maybe B
Explanation:
Hi! I'm not sure... If you want to take the risk, go ahead... But IF it's correct pls mark me the brainliest
What are the answers for questions 4 and 5?
Answer:
4. D (enzymes 1 and 3 works equally well in an acidic and alkaline environment respectively)
5. C. 2; 7; 9.5
Explanation:
The image attached to this question shows a graphical representation of the pH ranges for three enzymes. According to the image;
- Enzyme 1 reached its peak reaction rate at pH 2 (acidic)
- Enzyme 2 reached its peak reaction rate at pH 7 (neutral)
- Enzyme 3 reached its peak reaction rate at pH 9.5 (basic)
This result means that enzymes 1, 2 and 3 will work well and effectively at an acidic, neutral and alkaline environment respectively. Likewise, the optimal pH level for enzymes 1, 2 and 3 are 2; 7; and 9.5 respectively.
What is found between stars that looks like smoke?
Answer:
gases of nitrogen and many more
I don’t understand this so please help
Answer:
all I see is dots lines and circles
Explanation:
Fill in the blanks the world banks the word bank is on the picture provided below :)
Answer:
1 is pioneer species 2 is limiting factor 3 is ecological succession
Explanation:
Answer:
1) pioneer
2) limiting factor
3) ecological succession
WILL GIVE BRANLIEST. 30 POINTS
Explain the three ways genetic variation can occur in a population.
How many total ATOMS are represented?
2Fe(NO3)2
i think 2 atoms
one is 2Fe
second is NO3
During the process of photosynthesis, green plants produce...
(1) sunlight
(3) nitrogen
(2) methane
(4) sugar
Answer:
4
Explanation:
Plants are autotrophs, which means they produce their own food. They use the process of photosynthesis to transform water, sunlight, and carbon dioxide into oxygen, and simple sugars that the plant uses as fuel
How many valence electrons does this atom have? How do you know?
Answer:
5 valence electrons
Explanation:
valence electrons are the electrons at the ends of atom or in the valence cell. so there are 5 valence electrons.
1. What does H.I.P.P.O. stand for? Habitat destruction, Invasive species, pollution, population Increase and
over population
over production
over use
over exploitation
Human,increase population and Overharvesting
The predominant plants found in the savanna are grasses, and there are only a few isolated or small clusters of trees. Which abiotic factor helps to maintain the savanna as a grassland rather than a forest?
A Loose Soil
B Abundant rainfall
C warm temperatures
D lightning Fires
PLEASE HELP
Loose soil is the abiotic factor which helps to maintain the savanna as a grassland rather than a forest. Thus, the correct option is A.
What are abiotic factors?Abiotic factors are those components of the ecosystem which are non-living. Abiotic factors include soil, temperature, rainfall, fire, etc.
Savanna is a biome which contain predominantly grasses with a few isolated or small clusters of trees in the ecosystem. The loose soil in this biome is mainly responsible for maintaining savanna as a grassland rather than a typical forest.
Loose soil is an abiotic factor which is responsible for the forestation of an ecosystem. It is difficult for the big trees to hold the loose soil whereas the grass have their perennating organs protected below the surface of the soil. Thus, they are favored in the savanna biome.
Therefore, the correct option is A.
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ILL GIVE U BRAINLYIST
Answer:
D.
Explanation:
That is where it demonstrates how the word is said. it's easy to identify this because the pronunciation always comes right after the word itself in the definition.
Answer:hbhh
FffcffExplanation:
Please help ASAP!
How would a cell wall aid a plant during a period of heavy or prolonged rainfall?
Answer:
The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against stress
Explanation:
The cell wall aid a plant during a period of heavy or prolonged rainfall by providing structural support, prevents water damage, regulates water uptake and maintains turgor pressure.
What is a cell wall?Cell wall is the outermost covering of the cell above the plasma membrane, which plays an important role in helping the plant survive during periods of heavy rainfall and prolonged rainfall.
The ways in which it provides protection are:
Structural support- It provides necessary strength and rigidity to the plant, which helps it to stand upright and not collapse under the weight of water.Prevents water damage- It acts as a barrier by preventing water from entering the cells and causing damage to the plant internal structure.Regulates water uptake- It controls the flow of water into the plant, which helps regulate the water uptake and prevent the plant from taking in too much water.Maintains turgor pressure- It also helps to maintain turgor pressure.Hence, the cell wall provides significant support and protection for the plant during periods of heavy and prolonged rainfall.
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2. Which atom in the water molecule is negatively charged?
Answer:
oxygen atom
Explanation:
The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms. When a neutral molecule has a positive area at one end and a negative area at the other, it is a polar molecule.
Answer:
The oxygen
Hydrogen is positive
Explanation:
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PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! ASAPPPP
How do we differentiate between infectious and noninfectious diseases.
Answer:
Infectious diseases are caused by the passing of one person to another. Corona is an example. Noninfectious diseases, they are just spread by pathogens. Good luck!
What determines the amount of biomass a given trophic level can
support? *
Explanation:
cci3iviiti i ri ii4i i i4i krivi irj jrj jvj3i. ikeo o49 kr
When alleles are neither dominant or recessive, so both alleles are expressed, is
called what?
I
Answer:
hmoocigtoos
Explanation:
homocigotios
Your body uses feedback mechanisms to help maintain a stable internal environment called homeostasis. Changes can come from outside or inside the body and the body must respond to these adverse changes to return to a steady state. One such example is what happens when you go for a run on a hot summer day and your body temperature increases. According to the diagram, one of the mechanisms used to cool down is vasodilation. Similar mechanisms are also used when your body temperature drops due to a cold environment. Which of these would NOT help return a body to homeostasis by increasing body temperature?
A) shivering
B) vasoconstriction
C) muscles contract
D) increasing blood pressure
Answer:
Option D increasing blood pressure.
Explanation:
Increasing blood pressure
What is feedback mechanism in homeostasis?
Homeostasis is generally maintained by a negative feedback loop that includes a stimulus , sensor , control center , and effector . Negative feedback serves to reduce an excessive response and to keep a variable within the normal range.
What are the two feedback mechanisms which work to maintain homeostasis?
Homeostasis typically involves negative feedback loops that counteract changes of various properties from their target values, known as set points. In contrast to negative feedback loops, positive feedback loops amplify their initiating stimuli, in other words, they move the system away from its starting state.
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If you were an Amazon ant, how would you eat?
a. You would cultivate a special fungus
b. You would feed off the nectar produced by caterpillars
c. You would consume the pheromones produced by
other ants
d. You would be fed by "slave" ants from other species
Answer:
A
Explanation:
you have make your own cultivation so that you will no any else where for food
Describe the basic structure of the cell membrane with regard to specific molecules. What is it made out of?
Answer: The cell membrane is made up of phospholipids and the overall name is the Phospholipid bi-layer
Explanation:
The cell membrane has two rows of phospholipids. A phospholipid is broken into two parts, the heads and tails. The heads are hydrophilic (water-loving) and point to the outside and inside regions making the inner and outer wall, while the tails are hydrophobic (water-hating) and face each other to make the inside of the membrane. There are also molecules of cholesterol and proteins throughout the membrane.
Phospholipids are the building blocks of a cell membrane. A single phospholipid molecule consists of two ends: the head and the tail.
What are phospholipids?Phospholipids are amphiphilic molecules with both hydrophobic and hydrophilic fatty acid chains.
They are found in all living organisms as the primary components of cell membranes. Nature contains a variety of phospholipid classes with varying polar moieties.
Phospholipids are glycerol esters, fatty acid esters, phosphoric acid esters, and other alcohol esters.
Phosphatidylcholine, phosphatidylethanolamine, phosphatidylinositol, and phosphatidylserine are the most common phospholipids.
The phospholipid bilayer, which forms a stable barrier between two aqueous compartments, is the membrane's fundamental structure.
These compartments are the inside and outside of the cell in the case of the plasma membrane.
Thus, this is the basic structure of the cell membrane with regard to specific molecules.
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Please help me out!
Which of the following is NOT true about the chromosomes in your body?
-Include 46 total chromosomes
-Include 2 sex chromosomes
-Exist in 46 pairs
-Exist in 23 pairs
Answer:
Exist in46 pairs
Explanation:
Why type of cells in your body are created through the cell cycle and mitosis?
Mitosis is a way of making more cells that are genetically the same as the parent cell. It plays an important part in the development of embryos, and it is important for the growth and development of our bodies as well. Mitosis produces new cells, and replaces cells that are old, lost or damaged. Hope I helped! ^^
__________________________________________________________
有糸分裂は、親細胞と遺伝的に同じであるより多くの細胞を作る方法です。それは胚の発達において重要な役割を果たしており、私たちの体の成長と発達にとっても重要です。有糸分裂は新しい細胞を生成し、古い、失われた、または損傷した細胞を置き換えます。私が助けてくれたらいいのに！ ^^
Which generalization can be made from the data in the table?
1.The higher the temperature, the fewer chirps there will be in 10 seconds.
2.The chirps occur closer together as the temperature increases.
3.The chirps become farther apart as the temperature increases.
4.There is no relationship between temperature and the time between chirps.
The generalization that can be made is: 2.The chirps occur closer together as the temperature increases.
Generalization is a statement you state after making an inference from an observation. For example, we can make a generalization by observing or analyzing the data from the experiment conducted which are given in the table.
From the table given, there seems to be a trend that can be observed. Temperature seems to influence the number of seconds between each chirp of the cricket.
A closer observation of the trend from the data given shows that in general, as the temperature was increased, the seconds between chirps seem to shorten.
Therefore, we make a generalization stating that: "2.The chirps occur closer together as the temperature increases."
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Global measurements indicate that, in the late 2000s, sea levels steadily rose. Rising sea
levels lead to the migration of marshlands further inland. The environmental changes
caused by rising sea levels have the potential to?
O increase the stability of marsh habitats.
decrease the stability of marsh habitats.
O increase the biodiversity of organisms in marsh habitats.
alternately increase and decrease the biodiversity of marsh habitats.
Answer:
My Game is José Fernando Tengo 12 YEARS OLD
The environmental changes caused by rising sea levels have the potential to alternately increase and decrease the biodiversity of marsh habitats.
What is Biodiversity?Sum total of all the varieties of living organisms in a particular space, is known as its biodiversity.
As the sea levels steadily rose, it will firstly increase the biodiversity of marsh habitats, but sea level constantly rising, will affect its biodiversity, and organism that is native to marshy habitat should be eliminated while those organisms that are able to survive in inland habitat will migrate into it, overall causing the decrease meant of biodiversity of marshy habitat.
Therefore, the environmental changes caused by rising sea levels have the potential to alternately increase and decrease the biodiversity of marsh habitats.
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How are gay marriaged babys made to be biological?
Answer:
if its a couple with a trans man (female to male) they can have a baby if they havent had surgery.
a trans woman (male to female) can also have a biological baby with a woman if they havent had surgery.
They could also have had a baby in a past relationship though it wont be biological to the other parent.
Explain how ligand A and ligand B can cause identical cellular responses in a cell.
Answer:
if A and B are both dominant/recessive then they are the same
Explanation:
I'm not to sure but I think it's right
hope this helps : )
most common type of arch, loop and whorl?
Answer:
yes
Explanation:
most common pattern being found in 65 to 70 percent of all fingerprints
What makes echinoderms unique to all other animals? (think of systems/structures they
have that no other animal has!)
A couple has five children, all with blood type A. The mother's blood type is O, and the fathers blood type is A. Based on this info, what is the most probable genotype of the father?
Answer:
Homo-zygous, or AA
Explanation:
Since the mother's type is recessive O, the man's blood type A would be dominant. And because none of the children gained B or O blood types, it is likely the father only has A. This indicates homo-zygous (same) genotype, thus meaning his blood type is AA.
the reason for the dash between homo-zygous is because Brainly tagged it as inappropriate?
If you know please help
Answer:
A. freeze at the same temperature at which it melts, depending on whether the temperature is rising or falling.
Explanation:
Option A is the correct.
Freezing and melting are two changes that occur in the state of matter. Freezing is known to be the change that occurs when a substance (liquid) changes to solid when there is a decrease in temperature. While melting is known to be the opposite and it refers to the change that occurs when a solid changes to liquid as a result of increase in temperature.
When substances freeze, they do so in the same temperature as they melt. This is true because both freezing and melting actually describe similar transition of matter. So, it depends whether temperature is rising or whether it is falling.