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ioda
3 years ago
8

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.
Biology
1 answer:
VladimirAG [237]3 years ago
5 0

Answer:

  1. Hypothesis: Alleles assort independently from each other.
  2. 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.        

Download pdf
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Which of the following statements correctly state(s) the location or function of the cells in the epidermis and dermis? Select a
coldgirl [10]

Answer:

Keratinocytes are located in the stratum basale in the epidermis and the hair follicle of the dermis. This statement is correct.

Explanation:

Keratinocytes are in the stratum basale of the epidermis, which is the deepest layer of the epidermis; from this layer, they ascend to the stratum spinosum, then to the stratum granulosum, then to the stratum lucidum if the skin is thick like the one that is in our hands or soles, and lastly they end in the stratum corneum. While the keratinocytes move from one layer to the next one, they change their characteristics.

Keratinocytes are also in hair follicles, they are similar to the keratinocytes from the dermis, but have some differences, such as their reproduction capacity.

3 0
3 years ago
Select ALL that is true about osmosis. Osmosis is a type of active transport (DOES require energy). Osmosis is a type of passive
MAVERICK [17]
Osmosis is the movement from high to low concentrations with no energy
4 0
1 year ago
4. Living things are sometimes called "carbon-based life forms." Do you think this is a good way to describe life? Explain your
victus00 [196]

Answer:

Explanation:

Yes, for a couple of reasons.

1. Carbon connects easily with other carbons.

2. Carbon forms chemical that can change and connect with other carbons even in biology or especially in Biology. If you take a brown seen and plant it where it can get water and soil nutrients, to will come up as a green plant. Think about the chemistry that goes into that. Not only that, but there are mechanisms that tell the upper part of the plant that the roots can't supply any more growth. Isn't that something? All made from Carbon.

3. The human body is a mass of Carbon based chemicals and all cells there can have different functions. Amazing isn't it? I'm a fan of the diversity of our planet and its growth.

4 0
3 years ago
Persons with __________ blood have neither antigen a nor antigen b on their red blood cells but have antibody anti-a and antibod
Flura [38]

Persons with O blood have neither antigen a nor antigen b on their red blood cells but have antibody anti-a and antibody anti-b in their plasma.

ABO blood grouping was discovered by Austrian scientist Landsteiner. It consist of four blood groups- A, B, AB, & O.

Red blood cells have certain extension of the proteins that are called antigen. Two types of antigens are there antigen a & b. The RBCs which have a particular antigen will not have the antibody against the same.

Blood Group A has antigen A and antibody B. Blood group B has antigen B and antibody A. Blood group AB has both antigen and no antibodies while blood group O has no antigen and antibody A & B.

To learn more about red blood cells here

brainly.com/question/17890844

#SPJ4

8 0
2 years ago
Environmental problems whose dimensions include differential exposure to risk from toxic wastes and air pollution or lack of acc
lesantik [10]

Answer:

Option (A)

Explanation:

Environmental justice usually refers to a significant portion of the struggle that is extensive carried out in order to improve, upgrade and maintain a clean, hygienic and healthy environment. This struggle is mainly for those people who have traditionally lived, worked and was closely associated with the sources of various types of pollution.

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Hence, the correct answer is option (A).

3 0
3 years ago
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