The fungus Melampsora lini causes a disease known as flax rust. Different strains of M. lini cause varying degrees of the rust disease. Conversely, different strains of flax are resistant or sensitive to the various varieties of rust. The Bombay variety of flax is resistant to M. lini-strain 22 but sensitive to M. lini-strain 24. A strain of flax called 770B is just the opposite; it is resistant to strain 24 but sensitive to strain 22. When 770B was crossed to Bombay, all F1 individuals were resistant to both strain 22 and strain 24. When F1 individuals were self-fertilized, the following data were obtained:

43 resistant to strain 22 but sensitive to strain 24
9 sensitive to strain 22 and strain 24
32 sensitive to strain 22 but resistant to strain 24
110 resistant to strain 22 and strain 24

Required:
Explain the inheritance pattern for flax resistance and sensitivity to M. lini strains.

Answers

Answer 1

Answer:

Explanation:

Using the Mendelian approach to solve this question, we will understand that the mendelian approach has a pattern for inherited traits.

From the data set given, the total number of the population is:

43+9+32+110 = 194

However, their ratio are being calculated as follows:

43/194 = 0.22

9/194 = 0.05

32/194 = 0.16

110/194 = 0.57

After comparison with the Mendelian's approach, we realize that these results seem to be similar to the 9:3:3:1 ratio.

i.e.  

3/16 = 0.18

1/16 = 0.06

3/16 = 0.18

9/16 = 0.56

The inheritance pattern obviously dictates that the flax experiment proceeds in the pattern found in the Mendelian's Approach and the resistance of the two different strains were arbitrated by two traits.


Related Questions

QUESTION 6
Which statement is true about graded potentials?
a. They always produce action potentials.
b. They always depolarize a neuron.
c. They change the voltage of a neuron by different amounts.
od. They are "all-or-none."
Click Save and Submit to save and submit. Click Save All Answers to save all answers.

Answers

The answer is B.I believe

Describe how a rainforest can reach a point when it cannot be restored by secondary ecological succession

Answers

Answer:Although the secondary forest will be low in diversity and poorly developed, the forest cover will be adequate for some species to return (assuming they still exist).  The solution must be based on what is feasible, not overly idealistic, and depends on developing a new conservation policy built on the principle of sustainable use and development of rainforests. Beyond the responsible development of rainforests, efforts to rehabilitate and restore degraded forest lands along with the establishment of protected areas are key to securing rainforests for the long-term benefits they can provide mankind.

Explanation:

i lloke dit up online because i have not did this yet

A very high damaged leads to no restoration of rainforest by secondary ecological succession.

A rainforest can reach a point when it cannot be restored by secondary ecological succession when the large portion of the rainforest is destroyed and most of diversity is vanished. At this time, restoration is impossible due to very high damages.

Ecological resilience is the ability of an ecosystem to be restored through secondary ecological succession after a severe disturbance. Rainforest have a high biodiversity that helps it to resist damage but at a certain limit so we can conclude that very high damaged leads to no restoration of rainforest by secondary ecological succession.

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pleasseeee help...........

Answers

Answer:  

The theory of plate tectonics states that the Earth's solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle. Oceanic and continental plates come together, spread apart, and interact at boundaries all over the planet. It was proposed by Alfred Wegener.

Explanation:

You have been looking at meiosis beginning with a diploid cell that has the genotype AaSs. The alleles in the haploid gametes produced by meiosis are

Answers

Answer:

AS, As, aS, as

Explanation:

Meiosis is the cell division that involves the production of daughter cells or gametes with a reduced number of chromosomes. i.e. diploid (2n) - haploid (n).

According to Gregor Mendel in his law of Segregation, the alleles of a gene will separate into gametes in such a way that only one allele will be present in each sex cell. Hence, in this diploid cell with genotype AaSs, the alleles will separate into the haploid cell in the following genotype proportion:

AS, As, aS, and as

Many male birds will expend a great deal of energy building nests. Females will mate with the males who build the best nests. This is best described as an example of ____.
a. ​natural selection
b. ​sexual selection
c. ​runaway selection
d. ​an invasive species
e. ​disruptive selection

Answers

Answer:

The correct answer is option B.  sexual selection.

Explanation:

Sexual selection is a special type of natural selection proposed by Charles  Darwin. According to this type of natural selection in which a particular sex organism chooses the opposite sex member of the species to mate with on the basis of the preferable traits and compete with the other members of the opposite sex.

Here female birds choose those male birds who build the best nests, it is an example of natural selection.

The two main zones within the A climate are

Answers

Answer:

The Earth has three main climate zones: tropical, temperate, and polar. The climate region near the equator with warm air masses is known as tropical. In the tropical zone, the average temperature in the coldest month is 18 °C.

The climate has three main zones such as tropical, temperate, and polar.

What are Earth's climatic zone?

A climate zone refers to a condition by observing different factors like temperature, humidity, precipitation, season and natural vegetation of an area.

Earth's climate zones is surrounded by the horizontal belts of different climates such as tropical, dry, temperate, continental, and polar zones.

Firstly, Tropical climate zones which present near the Equator of earth and have high temperatures and high precipitation, while Dry or arid climate zones shows high temperatures  and little annual precipitation.

Similarly temperate climate zone observed  Earth’s middle latitudes and shows wider temperature and seasonal variations are more distinct.

Continental climate zone observed in mid-latitudes, shows swing of  temperatures  from cold in winter to warmer, where as polar climate zones shows harsh climate which cannot to support vegetation.

Hence, major zones are tropical, temperate, and polar.

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Which line points to the myelin sheath?

Answers

4.

Myelin Sheath is an insulator on the axon

Hope that helps! :)

Answer:D

Explanation:

What caused Antarctica’s climate to change from a more temperate climate to its current climate?
A)
isolation from the other continents
B)
El Niño
C)
being surrounded by ocean
D)
volcanic eruptions
E)
all of the above

Answers

Answer:

E

Explanation:

Answer:

E) All of the above

Explanation:

Got it right on the test

What is the structure shown in the figure?

Nucleic Acids

Carbohydrates

Proteins

Lipids

Answers

Answer:

lipids

Explanation:

Why can someone lost at sea die of thirst

Answers

Human kidneys can only make urine that is less salty than salt water. Therefore, to get rid of all the excess salt taken in by drinking seawater, you have to urinate more water than you drank. Eventually, you die of dehydration even as you become thirstier.

Answer:

someone can die at sea from thrist because there is no drinkable water.

Explanation:

You cannot drink the water surrounding you because it is salt water. (not the regular non-salt water we drink) the salt in the ocean water will actually dehydrate you more.

Hope this helps!!

The majority of pesticides do not have a residual effect (i.e., not persistent; lose chemical activity) in the soil.

a) True

b) False

Answers

Answer:

B- False

Explanation:

Pesticides can contaminate soil, water, turf, and other vegetation. In addition to killing insects or weeds, pesticides can be toxic to a host of other organisms including birds, fish, beneficial insects, and non-target plants. Soil can be degraded and the community of organisms living in the soil can be damaged by the misuse or over use of pesticides. Some pesticides are more toxic to soil organisms than others.

Hope this helps!

why is it important to understand plant physiology in crop/plant production and productivity?in your discussion make sure that you mention related fields/areas in agriculture which specifically require a background of plant physiology ​

Answers

Knowledge of Seed physiology helps in understanding of different physiological and morphological changes that occur during germination.  By knowing the different inputs requirement of plants (water, nutrients, sunlight) we can easily manage the plant population to get highest yield.

1. Which of the following does not absorb moisture readily ?
a.cotton
b.linen
c.viscose
d.acetate
e.nylon​

Answers

Cotton correct me if I’m wrong

Nylon does not absorb moisture readily.

What is nylon?Nylon is a synthetic fibre."It is made from reacting carbon-based chemicals found in coal and petroleum in a high-pressure, heated environment."It looks somewhat like silk.It is water repellent.

Hence, the correct option is e. nylon.

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Does a parrot eat a grasshopper?

Answers

, A green Parrot eats insects and it will also eat a grasshopper . Green Parrot is Omnivorous in Nature.

I hope this helped

why can b blood donate to AB blood?? ​

Answers


People with type AB+ blood are universal recipients because they have no antibodies to A, B or Rh in their blood and can receive red blood cells from a donor of any blood type. Plasma transfusions are matched to avoid A and B antibodies in the transfused plasma that will attack the recipient's red blood cells.

Answer:

Type B contains the B antigen.

This type is relatively rare (second only to AB). It contains the B antigen on its red blood cells, and the A antibody (to attack A antigens) in its plasma

Explanation:

Explain the contribution of antigenic determinant in false negative and false positive test

Answers

Answer:

The contribution of the antigenic determinant is given below:

Explanation:

Antigenic determinant or epitope is the part of the antigen that is recognized by the immune cells or antibodies such as the B- cells by binding to these cells and evokes the response in the host. The antibodies bind to the epitope segments only not to the entire antigen protein.

A false-positive test is a test where the result suggests that an individual has a specific condition but in reality not having such condition. opposite in the false-negative So, the antigenic determinant binds to the specific antibodies and shows wide significance to reduce the false-negative or false-positive.

Lateralization refers to the
a. number of neurons produced during prenatal development.
b. organizational structure of the peripheral nervous system.
c. specialization of the two hemispheres of the cerebral cortex.
d. plasticity of the spinal cord.

Answers

C. Specialization of the two hemispheres of the cerebral cortex

LIQUID DENSITY COLUMN
-Olive Oil
-Vegetable Oil
please help me with this question thanks:)

Answers

Answer: Vegetable oil

Vegetable oil is the ans

Which organelle makes lipids?

Answers

Answer:

endoplasmic reticulum

Explanation:

The endoplasmic reticulum is an organelle that is responsible for the synthesis of lipids and the modification of proteins.


Peroxisomes


Peroxisomes are metabolic organelles involved in bile acid synthesis, as well as the metabolism of glyoxylate, dicarboxylate, amino acids and lipids

what is Janus green b​

Answers

Answer:

Janus Green B is a basic dye and vital stain used in histology.

Explanation:

In the diagram of the nitrogen cycle, which number represents nitrogen
2 points
gas?
Terrestrial
cycling
Animals
68
7
Decomposition
2
Uptake
of amino
acids
ΝΗ,
4
оо

Answers

Answer:

The illustration below shows translation in progress. The orange structure represents a ribosome and the dark grey ones labelled A and

B represent 2 tRNA. Fill in the blanks in the next sentence and answer the short essay question that follows.

A

5'-AGGGACUAUGAACAUUUACCAACUACGGUGGCGUUAGAC

Explanation:

A __________________ is a place holder or object where you can store a value or piece of data named by you

HEYY YOU GUYS AGAIN. I HAVE A COUPLE OF QUESTIONS I NEED HELP ON. IF YOU CAN, PLEASE HELP ASAP.
which moon phase occurs when the moon is between the earth and the sun??
a. full moon.
b. waxing crescent.
c. new moon.
d. waning crescent.

Answers

Answer:

New Moon

Explanation:

There are eight phases of the Moon, which repeat every 29.5 days. New Moon. A new moon is usually not visible to the naked eye, as only the unlit portion of the Moon is exposed. This phase occurs when the moon is situated directly between the sun and the Earth. A solar eclipse can only occur during this phase. Waxing Crescent

C.New Moon A solar eclipse can only happen at new Moon. A waxing crescent moon is when the moon looks like a crescent and a crescent increases in size from one day to the next

What is the keystone species

Answers

Answer:

a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically

Explanation:

Answer:a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically.

Explanation:

The American Beaver (Castor canadensis) is one example of a keystone species in North America. In any arrangement or community, the “keystone” is considered one of the most vital parts. In a marine ecosystem, or any type of ecosystem, a keystone species is an organism that helps hold the system together.

which 3 reactions form atp?

Answers

Answer:

Answer below

Explanation:

The eight steps of the citric acid cycle are a series of redox, dehydration, hydration, and decarboxylation reactions. Each turn of the cycle forms one GTP or ATP as well as three NADH molecules and one FADH2 molecule, which will be used in further steps of cellular respiration to produce ATP for the cell.

10. According to Bohr's model of the atom, electrons behave like....
A. Waves on a vibrating string
B.Planets orbiting the
C.sun light energy in a vacuum​

Answers

B.Planets orbiting hiiiiii

When a patient comes to a hospital with severe dehydration, doctors will give
them an IV filled with a salt-water solution called saline, which is isotonic with
the body's blood cells.
Why is the patient not given pure water?

Answers

Answer:

The red blood cells could burst.

Explanation:

If they are given pure water, the IV fluid will be hypotonic to the blood cells. That means water will end the red blood cells by osmosis, from a high concentration outside to a lower concentration inside.

This will result in the red blood cells becoming swollen and even potential  bursting.

Besides plants and insects, what else would the student need in the ecosystem? Why?

Answers

Air, water , because without air we can’t live and without water too because our bodies need air and water

10 POINTS PLZ ANSWERRRR
Which of the following best describes non-matter?
A substance that is either a solid, liquid, or gas
Any material that has a length and a volume Anything with no mass that takes up no
space Something that takes the shape of a container​

Answers

Answer:

c is the answer in my opinion .

Explanation:

Its because non matter has neither volume nor mass and no space also.

Answer:

Matter is something that takes up space so the answer is Anything that does not take up space

Explanation:

how do mutations affect our communications?​

Answers

Explanation:

When a mutation alters a protein that plays a critical role in the body, it can disrupt normal development or cause a medical condition. A condition caused by mutations in one or more genes is called a genetic disorder. In some cases, gene mutations are so severe that they prevent an embryo from surviving until birth.Over time, a mutation might take place in one of the descendant cells, causing increased activity of a positive cell cycle regulator. The mutation might not cause cancer by itself either, but the offspring of this cell would divide even faster, creating a larger pool of cells in which a third mutation could take place.

A dihybrid cross experiment is carried out in pea plants. The traits being observed are flower color and stem length. In the F2 generation, 81 plants have purple flowers and long stems, 27 plants have purple flowers and short stems, 27 plants have white flowers and long stems, and 3 plants have white flowers and short stems.

Which traits are recessive?

A.purple flowers, long stem
B.purple flowers, short stem
C.white flowers, short stem
D.white flowers, long stem

Answers

C white flowers and short stem

Answer:

c

just took test

Explanation:

white flowers, short stem

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