Dihybrid crosses
1. In man, assume that spotted skin (S) is dominant over non-spotted skin (S) and that wooly hair (W) is dominant over non-wooly hair (W). cross a marriage between a heterozygous spotted, non-wooly man with heterozygous wooly-haired, non-spotted woman. Give genotypic and phenotypic ratios of offspring?
Explanation:
The phenotypes and genotypes of the progeny can be determined by a dihybrid cross of the parents.
The heterozygous male will have the genotype 'SSww' and the heterozygous female will have the genotype 'ssWW'.
When crossed, the F1 offsprings will have a hybrid genotype of 'SsWw'. These offsprings are heterozygous with spotted skin and wooly hair.
On self-crossing of the F1 hybrids, we find four different combinations of the alleles- SW, Sw, SW and sw. The probability of getting each of these combinations is 1/4.
Hence, the probability of any dihybrid type is 1 out of the 16 possible genotypes. Using Punnet square, we find
9 SSWW: 3 SSww: 3 ssWW : 1 ssww
This is the phenotypic ratio of the offsprings.
The ratio of the possible genotypes will be 1:2:1:2:4:2:1:2:1.
the diaphragm is innervated by the __________ nerve, which allows it to contract.
The diaphragm is innervated by the phrenic nerve, which allows it to contract.
What is phrenic nerve?The C3-C5 spinal nerves, which are parts of the cervical plexus, give rise to the phrenic nerve, a mixed nerve. It begins in the neck and travels through the thorax vertically before terminating on the diaphragm.
The phrenic nerve is bilateral, there are some significant distinctions between the left and right counterparts in terms of its courses and interactions with surrounding structures.
The primary purpose of the phrenic nerve, which makes it an essential part of the physiology of breathing, is to deliver the full motor innervation to the diaphragm.
Diaphragm is controlled by the phrenic nerve (the large dome-shaped muscle between abdominal and chest cavities). It is necessary for breathing. Diaphragm contracts as a result of signals sent by nerve (become thicker and flatter). This motion makes room for lungs to expand and take in air (inhalation).
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Pretest: professional skills
7
type the correct answer in the box.
what aspect of provider-patient relationships is the provider showing in the scenario?
dr. tyson brings his laptop and cell phone in to the exam room for a patient appointment.
tyson flips from screen to screen on the laptop and reviews lab results, current medications
technology that dr. tyson is using is negatively affecting his
communication.
A key component of medical treatment and the practice of medicine is the provider-patient connection. When a doctor attends to a patient's medical requirements, usually with the patient's consent, a doctor-patient relationship is established.
Provider showing is showing the share decision making drive aspect of provider-patient relationship.
Incorporating patient input into healthcare choices is known as shared decision-making. In order to achieve effective shared decision-making, providers must put the other tenets of meaningful communication into practice.Making sure patients receive the information needed to make a decision depends on patient education.The doctor is showing the lab results and explaining them to the patient which is beneficial for the patient.However another aspect of provider-patient relationship is being negatively affected here that is strong communication.learn more about provider-patient relationship here:
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The part of a root that is responsible for conducting water and dissolved mineral salt from the soil to the leaves is
Answer:
xylem
Explanation:
which of the following is true regarding speciation and mechanisms of evolution?
Speciation is one of the driving processes of evolution and results in the formation of new species.
What is evolution?Evolution is the process by which new organisms are formed from existing organisms due to changes that result in increasing complexity of the organisms.
Speciation is the process by which new species are formed from existing species.
Therefore, it can be concluded that speciation is one of the driving processes of evolution.
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What are the defining characteristics of amphibians?
Amphibians represent a group of vertebrates that require water to survive.
AmphibiansThey are one of the major divisions of vertebrates along with fishes, birds, and mammals.
In addition to possessing the basic features of vertebrates, amphibians have the following characteristics:
They are cold-bloodedThey can breathe through their skin as well as using lungsThey need water for survivalReproduction is by laying eggs that are fertilized externallyThey are mostly carnivorousMore on amphibians can be found here: https://brainly.com/question/13744586
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Which of the following is an example of pseudoscience?
An example of pseudoscience is Astrology.
What is Pseudoscience?Pseudoscience may be defined as a recommendation, a determination, or a method of illustration that is delivered as science but that lacks the severity important to the scientific approach.
Pseudoscience may always deal with the concept of recommendation methods which seems to be faulty and does not provide enough evidence to support the answer.
Biology, Chemistry, Physics, and medicine involve the approach of scientific methods in their contents. Hence, these branches of sciences do not get classified under Pseudoscience.
The complete question is as follows:
Which of the following is an example of pseudoscience?
BiologyAstrologyChemistryPhysicsMedicineTherefore, the correct option is B, i.e. Astrology.
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High population densities in urban areas have advantages and disadvantages. List as many of each as you can and defend your conclusion. How could the disadvantages be eliminated or reduced? Use evidence to support your conclusion.
Advantages :- More human population so more workers in different fields,More economy growth,More tax payers, More funds, More diversity ,More share of people for particular programs.
Disadvantages ;- Burden on economy, More exploitation of natural resources, pollution, deforestation, More use of water resources, more competition for survival :) hope this helps thanks
Assertion (A): A proton gradient cannot be established in the mitochondria.
Reason (R): Hydrogen molecules are pumped out of an internal space (the matrix) in the mitochondria.
Which of the following is TRUE for the above statements?
Both (A) and (R) are true, and (R) is the correct explanation of (A)
Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(A) is false, but (R) is true.
(A) is true, but (R) is false.
Based on the nature of proton gradient, (A) is false, but (R) is true.
What is a proton gradient?A proton gradient is a gradient that exists due to difference in proton concentration between the inner and outer mitochondrial matrix.
An assertion is a statement or claim stating a given position.
Assertion (A): A proton gradient cannot be established in the mitochondria.Reason (R): Hydrogen molecules are pumped out of an internal space (the matrix) in the mitochondria.The assertion, A, is false because a proton gradient is established in the mitochondria due to the function of the proton pump which pumps out protons from the inner mitochondrial matrix to the outer membrane.
The reason, R is true as hydrogen molecules are pumped out of an internal space (the matrix) in the mitochondria by the proton pump.
Therefore, (A) is false, but (R) is true.
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A biodiversity hotspot is a region that has lost at least
Answer:
diversity throughout all living organisms
1.What is one cost and benefits of double window glazing?
2.what is one cost and benefit of green roof?
( Science teachers if you see this please answer )
Explanation:
1.Warmer in the winter – Double glazing is great for insulation, it can also help capture natural heat and store it in the winter. This is a great way of keeping your home insulated in the winter months.
Energy cost savings – Less energy is used up to heat or cool a room when double glazed windows are installed, this results in lower energy bills and money being saved. Adding more layers of glazing will increase the insulation levels and save more money.
Cooler in the summer – Double glazed windows can trap some of the rays coming through the windows on a hot summer’s’ day causing your room to be cooler. This means less air-conditioning is required.
Safety – With more units being on double glazed windows, the safety of your home increases. They are harder to break and are sealed tighter than other windows.
Less condensation – Double glazed windows reduce the amount of moisture on your window panes, as the airtight seal prevents the condensation from building up. Other windows often allow condensation to build up which causes window panes to have mould in.
Less noise – With more units comes less noise and a quieter home. If you live by busy roads or in a generally noisy area then double glazed windows are crucial to you
the second answer is photograph
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The bacterial species Heliobacter pylori has been associated with the formation of stomach ulcers. The bacteria burrows into the mucosal lining of the stomach, degrading it and forming a hole. What type of innate defense is this bacteria overcoming
The type of innate defense this bacteria is overcoming is referred to as mechanical barrier.
What is Innate defense?This is referred to as the defense system which came with birth and they help protect the body from antigens.
The bacteria in this context also functions this way through overcoming mechanical barriers to attack the party of the body involved.
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Which energy transformation occurs in the 2nd step of photosynthesis?
Match the following. Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer. ResetHelp 1. : Chemical or mechanical process of breaking down foodstuffs into simpler units. 2. : Wavelike smooth muscle contractions that move foodstuffs through the alimentary tube. 3. : Enzymatic breakdown of any type of food molecule. 4. : Process by which simpler chemical units pass through the lumen of the gastrointestinal tract into the blood or lymph.
Matching the following words to the appropriate blanks
Digestion is Chemical or mechanical process of breaking down foodstuffs into simpler units Peristalsis is Wavelike smooth muscle contractions that move foodstuffs through the alimentary tube Hydrolysis is Enzymatic breakdown of any type of food molecule Absorption is process by which simpler chemical units pass through the lumen of the gastrointestinal tract into the blood or lymph Processes of the digestive systemThe terms associated with the sentences listed are the various processes of the digestive system and they are Digestion ( a process of breaking down consumed food into simpler units for absorption ), Peristalsis, hydrolysis and Absorption which is the last phase of the digestive system.
During absorption the chemical units from the digested food passes through the lumen of the gastrointestinal tract into the blood where they are used by the body for the growth and daily activities of the body.
Hence we can conclude that the words matching the sentences are as listed above
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The missing words matched to the blanks
HydrolysisAbsorption DigestionPeristalsisOn which structure do most neuron to neuron communications occur? group of answer choices
The structure on which most neuron to neuron communications occur is; Choice A; Structure 1.
Which structure is the site for most neuron to neuron communications?Neuron to neuron communications occur at junctions called synapses. At the synapse, a neuron interacts, more specifically, sends a message to another neuron. The synapses in discuss communicate using chemical messengers.
Remark;
A) 1
B) 2
C) 4
D) 3
E) 5
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Which of the following is true about the scientific method?
The conclusion should confirm the original hypothesis.
Scientists frequently do not work in a linear sequence.
It is important to follow each step in order so the results are valid.
All scientists utilize the same scientific method with the same steps.
The statement which is true about the scientific method is that "it is important to follow each step in order so the results are valid." Thus, the correct option is C.
What is the Scientific method?The scientific method may be characterized as an approach to investigation in which a problem is determined, appropriate data are collected, an assumption is composed of these data, and the hypothesis has been empirically experimented with.
Scientific methods always deal with a scripted format of identifying the problem, making a hypothesis, collecting the data associated with a hypothesis, synthesizing a methodology, observing it, and making a conclusion.
Therefore, the correct option for this question is C.
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Which of the following correctly describes what happens to liquid and gas particles with
more thermal energy?
Select one:
O a. Liquid and gas particles with more thermal energy expand.
O b. Liquid and gas particles with more thermal energy condense.
O c.
Liquid and gas particles with more thermal energy rise.
O d. Liquid and gas particles with more thermal energy fall.
Answer:
i think a. is correct answer (:
hope its help for u
What do inhibitory neurotransmitters cause ?
According to the research, inhibitory neurotransmitters cause the diminution of an action potential.
What are neurotransmitters?They are substances used by neurons to transmit impulses within the nerve synapse, they drive and balance said signals.
It is involved in inhibitory effects on the neuron, decreasing the probability that it will fire an action potential.
Therefore, we can conclude that according to the research, inhibitory neurotransmitters cause the diminution of an action potential.
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the diagram below shows several of the processes involved in the carbon cycle, but they are not labeled. use the labels to correctly identify each process
Photosynthesis, Decomposition, Respiration and Combustion are the processes involved in the carbon cycle.
What are the processes of carbon cycle?The processes that are involved in carbon cycle are Photosynthesis, Decomposition, Respiration and Combustion. Photosynthesis occurs only in plants whereas respiration occurs in all organisms.
Decomposition done by bacteria and fungi on the dead bodies of organisms whereas combustion occurs when the a material is burnt.
So we can conclude that Photosynthesis, Decomposition, Respiration and Combustion are the processes involved in the carbon cycle.
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The labels to correctly identify each process is
Photosynthesis Breathing in animalsrespiration Using up precious fossil fuels natural combustionThis is further explained below.
What is carbon cycle?The process through which carbon atoms constantly go from the atmosphere to the surface of the earth and again back into the atmosphere is referred to as the carbon cycle.
Generally, Photosynthesis is simply defined as photosynthesis is the green pigment and other creatures create nutrition from carbon dioxide and water using sunlight
In conclusion, To put it another way: photosynthesis (by the patch of grass) breathing in animals (on top of the bull) Taking a breath (on top of the tree) using up precious fossil fuels (on top of the factory) just burning up in the atmosphere (by the small fire)
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Which compound refer to those that are produced by plants or animals?
Natural compounds
Synthetic compounds
Biotechnology
None of the above
natural compounds I mean all organic compounds
Explanation:
many organic compounds are obtained directly from the plants and animal sources by suitable method of installation a few filling here example are carbohydrate cellulose sugar and starches for prediction of hunters of useful organic substances such as solved synthetic rubber explosive and plastic
A culture of living cells includes a solution called a
Answer:
C) medium
Explanation:
medium can be solid, semi-solid or liquid
mediums are designed to grow living cells of plants, animals, humans and microbes
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Two chromosomes that look alike and have the same sequence of genes in the same positions are a(n) ______ pair.
Answer:Gene
Explanation:
A distinguishing characteristic that can be inherited is a (n)
dhdjsjdjdjdidduyudyfiriyyfifiyfyuihf
The small intestine has special structures, called villi, which help absorption of digested food. Which of the following is NOT a feature?
B1. Good blood supply
B2. Impermeable walls
B3. Large surface area
B4. Thin layer of cells
B2) Impermeable walls
Villi together with it's microvilli tremendously increase surface area of absorption. And hence supports effective absorption of nutrients into blood. Villi have permeable membranes . Thus, nutrients can easily get their way through them.
Sample of practical recording
Aim:
Material required :
Procedure :
Observation :
Inference:
Is the neurone a cell, tissue or an organ?
Answer:
Cell
Explanation:
Glial cells and neurons are the two types of cells that make up the nervous system. Four tasks are carried out by glial cells, which make up the nervous system's supporting framework: Give the neurons structural support. protect the neurons. A neuron is a specialized, impulse-conducting cell that is the functional unit of the nervous system, consisting of the cell body and its processes, the axon and dendrites. Three components make up neurons (nerve cells), which perform the integration and communication processes. Axon terminals, dendrites, and axons. The cell body, also known as the soma, is their fourth component and is responsible for the fundamental functions of neurons. In the illustration to the right, a "typical" neuron is depicted. The neuron, a specialized cell created to send information to other nerve cells, muscle cells, or gland cells, is the basic functional unit of the brain. Neurons are nervous system cells that communicate information to other nerve, muscle, and gland cells. Axons, dendrites, and a cell body make up the majority of neurons.
Answer:
nerve type of cell
Explanation:
I looked it up
The p wave on an electrocardiogram (ecg) represents the depolarization of cells in the:
The p wave on an electrocardiogram (ecg) represents the depolarization of cells in the sinoatrial (SA) node.
What is sinoatrial node?The sinoatrial node is close to the opening of the superior vena cava. This bundle of nerve tissue propagates electrical impulses and therefore governs sinus rhythm from minute to minute.
Electrocardiogram is a test, it is possible to detect the rhythm of the heart and the number of beats per minute.
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Where does the H band lie?
The H band lie around the zone of the thick filaments and is the most appropriate choice.
What is H band?This appears in the middle of the sarcomere and consists of only myosin and is characterized by the presence of thick filaments in the structure.
In this band, actin is not present which is how the band is usually identified in the laboratory.
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When a fish swims from salt water into fresh water, its cells react by:
A. gaining water and swelling.
B. dividing to increase surface area.
C. fusing to decrease surface area.
D. losing water and shrinking.
When a fish swims from salt water into fresh water its cells react by losing water and shrinking. The correct option is D.
What is fresh water?Glaciers, lakes, reservoirs, ponds, rivers, streams, wetlands, and even groundwater contain fresh water.
These freshwater habitats cover less than 1% of the world's total surface area but are home to 10% of all known animals and up to 40% of all known fish species.
When a fish swims from salt water into fresh water its cells react by losing water and shrinking due to osmosis.
Thus, the correct option is D.
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A fish swims from salt water into fresh water, its cells react by gaining water and swelling. Thus, option "A" is correct.
What is osmosis?Osmosis is the movement of water through a semipermeable membrane from an area of low solute concentration to one of higher solute concentration to establish an equilibrium.
For example, The solutes are solids that dissolve in water and form ions, such as salts (NaCl) and sugars, these solutes are also found the cell’s cytoplasm.
Thus, option "A" is correct.
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Your kitchen is full of plants from different classes. Identify five different plants (or fruits of those plants, or products of those plants) and their class.
