From a cross between dihybrid individuals, whose diallelic genes code for one trait each, expressing complete dominance, the phenotypic ratio is B) 9 green-inflated : 3 green-constricted : 3 yellow-inflated :1 yellow-constricted.
-------------------------------
Since I do not have the cross, I will assume the cross involves two dihybrid individuals by looking at the options.
So, let us picture the situation,
Two diallelic genes code for one trait each, color and inflated/constricted pods.G allele is the dominant and codes for green podsg allele is recessive and codes for yellow podsI is the dominant allele and codes for inflated podsi is recessive and codes for constricted podsThese genes are not linked1st Cross) Two h0m0zyg0us individuals
Parental) GGII x ggii
F1) 100% GgIi
2nd Cross) Selfcross between F1 individuals
Parentals) GgIi x GgIi
Gametes) GI, Gi, gI, gi
GI, Gi, gI, gi
Punnett square) GI Gi gI gi
GI GGII GGIi GgII GgIi
Gi GGIi GGii GgIi Ggii
gI GgII GgIi ggII ggIi
gi GgIi Ggii ggIi ggii
F2) Genotype
1/16 GGII2/16 GGIi1/16 GGii2/16 GgII4/16 GgIi2/16 Ggii1/16 ggII2/16 ggIi1/16 ggii
Phenotype
9/16 G-I- ⇒ Green and Inflated3/16 G-ii ⇒ Green and constricted3/16 ggI- ⇒ Yellow and inflated1/16 ggii ⇒ Yellow and constrictedPhenotypic ratio 9:3:3:1
Options
A) 9 yellow-inflated : 3 yellow-constricted : 3 green-inflated: 1 green-constricted ⇒ NOT CORRECT
B) 9 green-inflated : 3 green-constricted : 3 yellow-inflated : 1 yellow-constricted ⇒ CORRECT
C) 9 green-constricted : 3 green-inflated : 3 yellow-constricted : 1 yellow-inflated ⇒ NOT CORRECT
D) 9 yellow-constricted : 3 yellow-inflated : 3 green-constricted : 1 green-inflated ⇒ NOT CORRECT
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A student is researching the inheritance patterns of different traits in chickens. She hypothesizes that red feathers are dominant over black, and the trait for crests are dominant over non-crested. She performs a test cross to confirm her hypothesis. To produce the F1 generation, she crosses two parents-- a chicken that is homologous for traits showing red and crested and a chicken that is homologous for traits showing black and non-crested. Which ratio best represents the phenotype of the F2 generation
9:3:3:1
1:1:1:1
2:2:1:1
16:0
Answer:
9:3:3:1
Explanation:
In this inheritance pattern, the ratio that best represents the phenotype of the F2 generation is 9:3:3:1. Thus, the correct option for this question is A.
What is a Phenotype?A phenotype may be defined as the mechanism of expressing genotypes in the form of traits. In more simple words, it is also characterized as the morphology or physiology which comes due to the combination of alleles.
If a trait of red feathers is denoted by R and the trait of black feathers is denoted by r, then R > r. Similarly, a trait of crests is denoted by C and the trait of non-crested is denoted by c, then, C > c.
Now, RRCC is crossed with rrcc, the F1 offspring have the genotype RrCc with the phenotype of red feathers with crests. Now, RrCc is selfed, it produces the ratio of 9:3:3:1. This is an example of a dihybrid cross.
Therefore, in this inheritance pattern, the ratio that best represents the phenotype of the F2 generation is 9:3:3:1. Thus, the correct option for this question is A.
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Explain in your own words what is meant by one of the diagrams below, you only need to choose 1 to talk about. Share as much detail as you can.
The T-Rex diagram relates to the evolution of species on planet Earth.
The following images are shown in this diagram:
A T-Rex dinosaurA drawing of the planet EarthA drawing of grassA drawing of a cowA drawing of a humanThese 5 pictures can be related to finding the main message of the diagram. This diagram can be interpreted as the evolution of species on planet Earth because a dinosaur is shown first, a species that lived millions of years ago.
An image of the Earth is then displayed showing the familiar shape of the continents to demonstrate evolution on the Earth's surface.
Then show the grass because this represents the evolution of plant species that were expanding throughout most of the Earth.
Subsequently, a cow is shown as an example of the mammalian animals that exist today and finally the human who is the product of various evolutionary processes that resulted in the society and the world that we know today.
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. Insulin controls the insulin level in ____________
Answer:
I dont really understand the question but if anything its the pancreas
Explanation: The pancreas produces insulin
Someone plz help me plzz :(
Answer:
C if i remember correctly
Explanation:
i did this yesterday for plant cell biology
Answer:
From what I see this is a cell and the part label Y is where the enzymes break down food so the closer answer would had been C
Use the
Color-Enhanced TEM Magnification: 15,000 x
6. The photomicrograph shows which kind of cell?
A. prokaryotic cell C. animal cell
B. eukaryotic cell D. plant cell
A. Prokaryotic Cell.
..............
Which statement correctly describes mitotic cell division?
Answer:
Explanation:
“Although part of your question is missing, you might be referring to this full question:
Which of the following correctly describes how mitosis and meiosis are similar?
A. Sister chromatids segregate to opposite poles of the cell during both mitosis and meiosis.
B. Crossing over occurs between homologous chromatids during both mitosis and meiosis.
C. Both mitosis and meiosis produce diploid daughter cells.
D. Both mitosis and meiosis produce genetically identical daughter cells.”
The statement that correctly describes how mitosis and meiosis are similar is “Sister chromatids segregate to opposite poles of the cell during both mitosis and meiosis”.
Mitosis and Meiosis both are classified under cell division that tends to take place in humans and certain other animals. Both Mitosis and Meiosis have both differences and similarities in the way they result in new cells with varying goals and slightly different outcomes. Some of the similarities between meiosis and mitosis are:
During both mitosis and meiosis, cells must duplicate their DNA and pull them apart into 2 sets and further place the sets on each end of itself and then divide down the middle part
Both meiosis and mitosis results in fresh new cells depending on the genes of their parent cells
Thus, we can conclude that the statement that correctly describes how mitosis and meiosis are similar is “Sister chromatids segregate to opposite poles of the cell during both mitosis and meiosis”. Hence, option A is the correct answer.
helper t cells secrete ________ to stimulate the proliferation of b cells.
Answer:
Helper T cells are activated when they bind to their target antigen being displayed on an antigen-presenting cell. These cells then release what chemical? Cytokines, which is a chemical that signals B cells and other T cells to activate.
Helper T cells secrete cytokines to stimulate the proliferation of B cells.
What are Helper T- Cells?Helper T cells, also known as CD4+ T cells, are a type of white blood cell that play a critical role in the adaptive immune response. They are called "helper" cells because they help activate and coordinate other cells in the immune system, including B cells and cytotoxic T cells, to mount an effective response against a specific pathogen or foreign substance.
Helper T cells recognize and bind to antigens presented by antigen-presenting cells, such as dendritic cells, and then secrete cytokines that activate and differentiate other immune cells.
They also play a role in regulating the immune response to prevent excessive inflammation and tissue damage. Helper T cell dysfunction or depletion is associated with a number of autoimmune and infectious diseases.
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in humans, how does the circulatory system bring oxygen to every cell in the body?
Answer:
I found this in a science text, hope it helps.
Explanation:
"Blood from the heart is pumped throughout the body using blood vessels. Arteries carry blood away from the heart and into capillaries, providing oxygen (and other nutrients) to tissue and cells. Once oxygen is removed, the blood travels back to the lungs, where it is reoxygenated and returned by veins to the heart."
Basically, blood from the heart is taken away by arteries and then into capillaries, transferring oxygen to cells.
I hope I could help!
The circulatory system of human body brings about oxygen to the every cell by the help of blood. The heart of human body helps to pump up the blood with oxygen and makes it oxygenated.
What is the size of a human heart ?A size of a human heart is a size of a human fist it has 4 chambers where with 2 auricles and 2 ventricles. The auricles receive the oxygenated blood and the ventricles get the deoxygenated blood.
The human heart is bringing oxygen to the cells of the body where the oxygen combined with the Fe component that is iron of the blood and reaches every cell of the blood through the blood. Blood is transported to every cell of the body through the blood vessels.
Arteries carry the oxygenated blood and ventricles carry the deoxygenated blood where the blood that reaches the cellular level by the veins and the arteries along with the blood vessels that form a network.
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Where is the enzyme amylase found?
Answer:
b. In saliva and the pancreas
Explanation: is the correct answer
what is this i tried doing it but i just dont get it at all 7.5 + n + 9.63.
Answer:
+17.13
Explanation:
brainliest please
Solving?
Answer:
n+17.13
Explanation:
Add the numbers
7.5+n+9.63
17.13+n
Rearrange terms
17.13+n
n+17.13
Solution
n+17.13
How are the nitrogen and carbon cycles similar? What makes the phosphorous cycle different?
-Both carbon and nitrogen involve getting the element out of the biosphere into the atmosphere. Phosphorous is found in the atmosphere.
-Both carbon and nitrogen involve putting the element into the biosphere and atmosphere. Phosphorous is not found in the atmosphere.
-Both carbon and nitrogen involve putting the element into the biosphere and atmosphere. Phosphorous is found in the atmosphere.
-Both carbon and nitrogen involve getting the element out of the atmosphere into the biosphere. Phosphorous is not found in the atmosphere.
Answer: that carbon cycles through the atmosphere whereas phosphorus does not
Explanation:
The cheetah is considered one of the fastest land animals on Earth. How does the cheetah get the energy to run? Construct an explanation to describe how the cheetah's energy and photosynthesis are related
Answer:
by resting and and a small amount of sleep
Explanation:
because the cheetah needs to rest it's body to maintain energy
it needs sleep as well
i hope this helps you!
PLEASE HELP 100 POINTS AND BRAINLY!!
Answer:
1.prophase
2. metaphase
3.anaphase
4.telophase
Explanation:
Had the same question a quiz i took
Beaches are monitored to protect public health. Waterborne pathogens can cause illnesses. Which of the following ways can pathogens enter coastal waters?
Leaking sewer pipes and untreated wastewater
Precipitation through the water cycle
The changing of low tide to high tide
Through the interactions of marine organisms and plants
Waterborne pathogens can enter coastal waters via leaking sewer pipes and untreated wastewater.
Sewage and untreated wastewaters are filled with microbes some of which are capable of causing diseases to humans and livestock if given the opportunity. Hence, the seeping of these waters into coastal water is a risk to humans who might want to swim or make use of coastal waters.
Precipitation, changing of tides and the interactions of marine organisms and plants will ordinarily not form pathways through which pathogens can gain access to coastal waters.
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Which nerve is responsible for hiccups?
Answer:
b. Phrenic nerve
Explanation: is correct
Which process provides humans with the glucose needed for cellular respiration?
Answer:
Glycolysis
Explanation:
Your body uses cellular respiration to convert glucose to ATP and carbon dioxide using oxygen. Glucose moves through three stages in cellular respiration, glycolysis where glucose is converted to pyruvate, and two ATP and NADH are made
Which of the following is NOT part of the non-specific immune response?
A. Inflammation
B. Phagocytosis
C. Antibodies
D. Interferons
D. Interferons are not a part of the non-specific immune response.
What is the function of interferons?Interferons were first described as an antiviral thing that interferes with viral replication in mammalian cells (10). they're secreted from inflamed cells and spark off an innate immune reaction that promotes now not best cytokine production but additionally herbal killer mobile features and antigen presentation.
Interferons (IFNs) — the body's first line of antiviral defense — are cytokines that are secreted by host cells in reaction to virus infection. by using inducing the expression of hundreds of IFN-inspired genes, numerous of that have antiviral capabilities, IFNs block virus replication at many ranges.
Interferons are a circle of relatives of clearly-happening proteins which are made and secreted with the aid of cells of the immune gadget (an example, white blood cells, natural killer cells, fibroblasts, and epithelial cells).
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the hair cells that detect sound vibrations lie on the ________ membrane.
Answer:
Basilar
Explanation:
Hydrogen and oxygen are examples of which of these?
elements
compounds
molecules
none of the above
You need to prepare for an exam on mitosis. You search for models of mitosis to help you. What kind of model should you choose?(1 point)
a model that simply lists the steps of cell cycle
a model that shows the steps of meiosis
a model that illustrates how a cell divides into two identical cells
a model that illustrates the organelles of cells
Answer:
- A model that illustrates how a cell divides in two identical cells -
Explanation:
The process mitosis means the daughter cells dividing
so the only thing that actually makes sense is the model that shows the division not the steps of all cell cycles or organelles of cells!!
Also, if you taking the biology exam I have a little reminder for you.
!! YOU GOT THIS !!
why does chlorophyll make most plants appear green?
which receptors respond to stimuli within the body?
Answer:
Sensory receptors respond to stimuli.
Explanation:
They can be classified by their location, the type of stimulus they detect or by their structural complexity.
Sensory receptors are the receptors which respond to stimuli within the
body. The body have five major sensory organs which include the eyes,
nose, tongue, ear and skin.
These organs have receptors which is responsible in the transmission of
signal to the brain for action. The brain acts depending on the signal
received which is usually in the body's best interest.
This makes our sensory organs important and very delicate and as a result
should be adequately protected and taken are of.
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Which of the following is the longest nerve in the body?
Answer:
a. Sciatic nerve
Explanation: is correct
Height in humans is a polygenic trait with a distribution similar to the graph shown. Which is true concerning the distribution of height in human populations?(1 point)
Most individuals will be below average height.
Most individuals will be at the extremes of height.
Most individuals will be of average height.
Most individuals will be above average height.
Answer:
Most individuals will be of average height.
Explanation:
Just took it and got 100%.
1. Which statement best describes a polygenic trait?
-A polygenic trait is controlled by multiple genes and influenced by the environment.
2. IQ is determined by:
-multiple genes and environmental factors
3. Which statement best describes trait distribution?
-Distribution describes how the variation in traits is spread across a population.
4. Which statement is true?
-Mendelian traits cannot be shown on a bell curve.
5. Height in humans is a polygenic trait with a distribution similar to the graph shown. Which is true concerning the distribution of height in human populations?
-Most individuals will be of average height.
Hope this helps have a good day and happy holidays!! ^^
Since transport of materials in and out of the cell can only happen at the cells surface, what problem does this pose for larger cells
Answer:
More surface area being taken up meaning in less cells getting in or out.
a patient visits her doctor and explains that since being hit on the cheek with a hockey puck she has been suffering from dry eyes and a dry mouth. it’s apparent to the doctor that, because both lacrimal secretion and salivary secretion are affected, there may be damage to the ____________ nerve.
Answer:
a patient visits her doctor and explains that since being hit on the cheek with a hockey puck she has been suffering from dry eyes and a dry mouth. it’s apparent to the doctor that, because both lacrimal secretion and salivary secretion are affected, there may be damage to the ____________ nerve.
Explanation:
facial
all the best
the green pigment that traps the energy of sunlight for photosynthesis is
how much time does it take autumn to travel 240 meters at a speed of 80 meters per second
What does a plant need to create a glucose molecule in photosynthesis?
Choose all correct answers.
carbon dioxide
sunlight
water
oxygen
Answer:
sunlight
water
oxygen
Explanation: cuz i said
what determines how closely related 2 species are?
Answer:
Before: (Darwin did) Physical features and behavior
Now:
DNA Testing
Explanation:
Similarities are often easy to see when one looks at two organisms that evolved from a common ancestor, and until recently, looking at physical features and behavior was the only way to determine how closely related two organisms are. However, now scientists can also analyze DNA to discover how closely organisms are related. Every living creature has DNA, which has a lot of inherited information about how the body builds itself. Scientists can compare the DNA of two organisms; the more similar the DNA, the more closely related the organisms. This method can also help when looks are deceptive. One example of looks being deceptive is: The bat and the crow both have wings, and the squirrel does not. From this, one may think that bats and crows are more closely related than bats and squirrels, while the opposite is indeed the case.