A cross was made between two strains of plants that are agriculturally important. One strain was disease-resistant but herbicide-sensitive; the other strain was disease-sensitive but herbicide- resistant. A plant breeder crossed the two plants and then allowed the F1 generation to self- fertilize. The following data were obtained:
F1 generation: All offspring are disease-sensitive and herbicide-resistant
F2 generation: 157 disease-sensitive, herbicide-resistant
57 disease-sensitive, herbicide-sensitive
54 disease-resistant, herbicide-resistant
20 disease-resistant, herbicide-sensitive
Total: 288 Formulate a hypothesis that you think is consistent with the observed data. Test the goodness of fit between the data and your hypothesis using a chi square test. Explain what the chi square results mean.
Answer:
Hypothesis: Alleles assort independently from each other.There is not enough evidence to reject the null hypothesis.Explanation:
Due to technical problems, you will find the complete answer and explanation in the attached file.
Researchers studying a small milkweed population note that some plants produce a toxin and other plants do not. They identify the gene responsible for toxin production. The dominant allele (T) codes for an enzyme that makes the toxin, and the recessive allele (t) codes for a nonfunctional enzyme that cannot produce the toxin. Heterozygotes produce an intermediate amount of toxin. The genotypes of all individuals in the population are determined and used to determine the actual allele frequencies in the population.
Required:
Is this population in Hardy-Weinberg equilibrium? Calculate the T and t.
Complete question:
Researchers studying a small milkweed population note that some plants produce a toxin and other plants do not. They identify the gene responsible for toxin production. The dominant allele (T) codes for an enzyme that makes the toxin, and the recessive allele (t) codes for a nonfunctional enzyme that cannot produce the toxin. Heterozygotes produce an intermediate amount of toxin. The genotypes of all individuals in the population are determined (TT = 0.56; Tt = 0.28; tt = 0.16) and used to determine the actual allele frequencies in the population. Is this population in Hardy-Weinberg equilibrium? Calculate the T and t.
Answer:
No, the population is not in H-W equilibrium
Explanation:
Due to technical problems, you will find the complete explanation in the attached file
List three types of blood cells and indicate what they do to help your body maintain homeostasis
Answer:
Both cells present in the blood come from the marrow of the bone. They start their lives as stem cells and develop into three main cell types: RBCs, WBCs, and platelets.
RBCs- The red blood cells supply the cells with oxygen and extract carbon dioxide. ... In controlling the processes of the body and preserving homeostasis, blood plays an important role. It carries out many functions within the body, including: supplying tissues with oxygen (bound to hemoglobin carried in red cells)
WBCs-Ce with white blood
Explanation:
When DNA replicates, the first step is
O proteins move along the DNA and "read" the code
DNA polymerase adds new nucleotides to the old strands
a proofreading enzyme checks to see if there are errors in the order of the nucleotides
the double helix is opened down the middle by an enzyme called helicase
why is system thinking important
Answer:
Systems thinking is a powerful approach for understanding the nature of why situations are the way they are, and how to go about improving results. Historical perspective is important in understanding the evolution of a situation and in identifying patterns of behaviors over time.
Explanation:
Which of the following are sources of low-level radiation?
A)
medical X-rays
B)
nuclear weapons testing
C)
buring of fossil fuels
D)
all of the above
E)
a and c only
Answer:
im pretty sure its E
Explanation:
The sources of low-level radiation are A) medical X-rays and E) the burning of fossil fuels, so the correct answer is E) a and c only, as radiation can be classified into two main types: ionizing radiation and non-ionizing radiation.
What is radiation?Medical X-rays are a type of ionizing radiation used for medical imaging. Although the amount of radiation exposure from a single X-ray is usually very small, frequent exposure to X-rays can increase the risk of cancer. The use of X-rays in medical imaging is carefully monitored to ensure that the benefits outweigh the risks. Ionizing radiation has enough energy to remove tightly bound electrons from atoms, which can cause damage to living tissue and increase the risk of cancer. Medical X-rays and the burning of fossil fuels are sources of ionizing radiation that can produce low-level radiation.
Hence, the sources of low-level radiation are A) medical X-rays and E) the burning of fossil fuels, so the correct answer is E) a and c only.
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Which best describes the process of peer review?
A. Scientists examine each other's work to make sure it is not biased
or unreliable.
O
B. Scientists prevent other scientists from seeing their experimental
data
C. Scientists allow other people to choose their control groups.
D. Scientists allow other people to draw the conclusions from their
work
Answer:
a
Explanation:
A. Scientists examine each other's work to make sure it is not biased
or unreliable.
Which feature may interrupt the sides of a composite-cone volcano?
conduits
fumaroles
craters
calderas
The feature may interrupt the sides of a composite-cone volcano is fumaroles. Thus, option B is correct.
What is fumaroles?They are gaseous emissions from lavas in craters at more or less elevated temperatures. Its composition varies according to the temperature of the lavas, in such a way that it changes since the fumaroles appear until their extinction.
Fumaroles are gaseous emissions from lavas in craters at more or less elevated temperatures. Its composition varies according to the temperature of the lavas, in such a way that it changes since the fumaroles appear until their extinction. Water flows in the form of steam continuously through the cracks of a volcano or volcanic surface because its temperature exceeds 100 °C.
Water flows in the form of steam continuously through the cracks of a volcano or volcanic surface because its temperature exceeds 100 °C. The lavas, in such a way that it changes since the fumaroles appear until their extinction.
Therefore, The feature may interrupt the sides of a composite-cone volcano is fumaroles. Thus, option B is correct.
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What are the causes of inherited genetic variation
Answer:
Genetic variation can be caused by mutation which can create entirely new alleles in a population, random mating, random fertilization, and recombination between homologous chromosomes during meiosis which reshuffles alleles within an organism's offspring.
Explanation:
hope this helps!!
Answer:
Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).
Why is it NOT correct to say that individuals evolve?
Answer:
individuals grow and develop throughout their life, but evolution is something that happens to a species over generations. evolution takes a long time and is a species adaptation to its environment, such as arms getting longer or extra bones. babies are born with these adaptations throughout generations, it’s not something individuals develop during their lifetime.
hope this helps!
There 4 types of connective in the body List the 4 types and then thoroughly explain why these tissues are grouped together as connective tissues What do they have in common?
Answer:
Connective tissues come in a vast variety of forms, yet they typically have in common three characteristic components: cells, large amounts of amorphous ground substance, and protein fibers.
Explanation:
An organism that has adaptations that enable it to hibemate for long periods of time is more likely to by found in which of the following biomes:
forest
desert
grassland
tundra
What Describes the layer directly beneath Earths plates
Answer:
The layer below the rigid lithosphere is a zone of asphalt-like consistancy called the Asthenosphere . The asthenosphere is the part of the mantle that flows and moves the plates of the Earth. The mantle is the layer located directly under the sima. ... The mantle is composed of very hot, dense rock.
Explanation:
Answer: This layer would be called the asthenosphere.
Help ASAP , easy 15 points and a brainly for the first one to reply , just answer the 2 questions
Which animals have webbed Feet?
Answer:
Ducks, pelicans, crocodiles, platypuses, along with some frogs, dogs, and cats.
Answer:
Ducks, pelicans, crocodiles, platypuses, along with some frogs, dogs, and cats.
Explanation:
If the offspring of the cross showed ccdominance, what would the eyes of the offsping look like?
Answer.. the offspring would have one circle eye and one star eye.
Answer:
That is what I would choose
Explanation:
When two different phenotypes of an organism are crossed, a third phenotype is created in which both of the parental traits are present. This is known as codominance.
What are the results of codominance cross?The concept of codominance states that although both phenotypes are dominant, they cannot coexist. Codominance would result in patches rather than merging, with areas of prominent white expression and areas of dominant red expression.
The statements made about codominance are all accurate. The full expression of both alleles is present.
The distinct results of both alleles are present in the heterozygous phenotype. A multiple-allele characteristic has (less than / only / more than) two alleles in the corresponding gene.
Therefore, The offspring would have one circle eye and one-star eye.
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I neeed help ASAP please??!!!
compare the hygiene allergies and asthma?
Answer:
According to the “hygiene hypothesis,” the problem with extremely clean environments is that they fail to provide the necessary exposure to germs required to “educate” the immune system so it can learn to launch its defense responses to infectious organisms. Instead, its defense responses end up being so inadequate that they actually contribute to the development of asthma.
Explanation:
Which of the following is NOT a type of muscle?
Question 19 options: The answer is "LONG" the rest are muscles.
Cardiac
Skeletal
Long
Smooth
Answer:
Long is not a muscle
Explanation:
the 3 types of muscles are cardia skeletal smooth, have a great day
The answer is "Long." "Long" is not a type of muscle; it seems to be an incorrect option. The correct options for types of muscle are Cardiac, Skeletal, and Smooth.
These are the three main types of muscles found in the human body. Cardiac muscles are found in the heart, skeletal muscles are attached to the skeleton and enable voluntary movement, and smooth muscles are found in various organs and control involuntary movements.
Therefore, "Long" is not a recognized type of muscle and does not fit within the categories of cardiac, skeletal, or smooth muscles.
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Why does ice float on water?
A.
The temperature of ice is lower than the temperature of water.
B.
The temperature of water and ice are the same.
C.
The density of Ice is less than the density of water.
The density of ice is greater than the density of water.
D.
Reset
Next
Answer:
The density of ice is less than the density of water
Explanation:
How is mutation different from adaptation?
Answer:
It can be a genetic mutation or it can be a change in a strategy. ... In this definition a mutation is any evident change (regardless of its effect on success), and adaptation is a change that made the group thrive in a given circumstance or environment.
Explanation:
Answer:
mutation can be a change in strategy and adaption is a change that made the group thrive in a given circumstance or environment.
2.
Which of the following is an example of a prototype for the concept of leadership on an athletic team?
Answer:
the star player
the phosphate groups are the polar part of the phospholipid because they are:
The human appendix, a vestigial structure, is part of which structure.
Answer:
Appendix, in anatomy, a vestigial hollow tube that is closed at one end and is attached at the other end to the cecum, a pouchlike beginning of the large intestine into which the small intestine empties its contents. It is not clear whether the appendix serves any useful purpose in humans.
The answer is anatomy.
PLzzz helpp Directions: Analyze the image and answer the question that follows.
1. Which line, red or black, represents a reaction taking place with an
enzyme? How do you know?
Answer:
red
Explanation:
Enzymes lower the activation energy needed for a reaction to occur.
Which type of force is a contact force?
A. Gravity
B. Electromagnetic force
C. Friction
D. Strong nuclear force
Friction is the answer
Answer:
Friction
A-P-E-X
A dihybrid cross experiment is carried out on pocket mice. The traits being observed are fur color and tail length. In the F2 generation, 54 mice are dark brown with long tails, 18 mice are dark brown with short tails, 18 mice are tan with long tails, and 6 mice are tan with short tails.
Which traits are dominant?
tan fur, long tail
tan fur, short tail
dark brown fur, short tail
dark brown fur, long tail
Answer:
dark brown fur, long tail
Explanation:
how are unicellular and multicellular organisms different
Answer:
Unicellular organism are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organism use many different cells to function.
Explanation:
Which is a cause of chemical weathering
A.gravity
B.acid
C.sunlight
D.wind
Answer:
B. Acid
Explanation:
Acid is the cause of chemical weathering because chemical weathering only occurs when water or whatever mixes with the water is slightly acidic, i.e. salt deposits on the ground mixing with run-off rain water and wearing away at the surrounding environment. Acid rain is also the perfect example of this.
Look at the diagram. What type of cell is shown by number 4?
Answer:
we cannot see a diagram