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Alexus [3.1K]
2 years ago
15

Were all ascospores of the same color _____________________ if not, how did the colors become mixed.

Biology
1 answer:
Oksana_A [137]2 years ago
3 0

No, all ascospores are not of the same color.

It is produces in black spores and has a mutant variety that is tan colored.

The wild type (+), which creates a dark spore, is the one that is most frequently observed in nature.

<h3>Which alleles in Sordaria result in the color black in their spores?</h3>
  • Melanin formation is the cause of the color black.
  • Several genes contribute to the creation of black color, however the two most prevalent ones are the tan spore gene and the gray spore gene.
  • One gene determines the color of the spores.

<h3>Why do we split the events of the Sordaria cross over by two?</h3>
  • Each crossover results in the production of two spores that are identical to the parents' spores and two additional spores.
  • As only half of the spores in each ascus result from crossing across, you must divide the number of asci counted by two to get the number of crossovers.

To learn more about ascospores visit:

brainly.com/question/5839906

#SPJ4

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1. Meiosis is critical for which of the following processes
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Both processes have a growth period called interphase, in which a cell replicates its genetic material and organelles in preparation for division. The two cells that result after meiosis I enter meiosis II very quickly, during the brief interphase period, no further DNA replication takes place.

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3 years ago
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Explain the interaction that occurs between a t-helper lymphocyte and a b cell when the b cell is being induced to produce peanu
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Answer:

           According to Dr. Ray Schiling (member of the American Academy of Anti-aging medicine) about 1.5 million people suffer from peanut allergies. The seeds of peanut (<em>Arachis hypogea</em>) contain an array of allergens that can induce the production of IgE specific antibodies predisposed individuals. Ara1 and Ara2 are most common seed storage protein that cause allergy. Other allergen proteins such as Ara3 to Ara 17 have also been identified that cause allergy.  


Entry of peanut allergen into body

When peanut allergens enter the body of an individuals it leads to development of different symptoms like itchy skin, tingling sensation, nausea, runny nose and anaphylaxis.  

Allergic response

There are two subsets of T-cells Th1 and Th2. Both invoke different response to allergens. Th1 direct a non-allergic response while Th2 direct allergic response ranging from releasing of histamine to anaphylactic response. The presence of IL-12 cytokines direct a Th1 based, nonspecific response.  


Mechanism of allergic response (interaction between helper T cell and B cell)

Step 1.  

           When allergen enter to body they are encountered by B cells. Immunoglobulin receptors on the surface of B cells recognize antigen (Peanut allergens) and get attached, which are then internalized and processed. Within B cells the fragments of antigens combine with HLA class 2 proteins.  

Step 2

             HLA class 2 with antigen fragments (peanut allergens) then display on the surface of B cells.

Step 3

            Receptors on the surface of helper T cells recognizes the complex of HLA class 2 and antigen fragments (peanut allergen) and is activated to produce cytokines, which activate the B cells.  

Step 4

             B cell is activated by cytokines and begins clonal expansion. Some of the progeny become anti-body producing plasma cells while other become memory B cells.  


7 0
3 years ago
________ are characteristics of downcutting streams and a youthful stage of valley evolution.
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<span>For the answer to the question above, I'll just complete the sentence for the answer to your question. "Radial" are characteristics of downcutting streams and a youthful stage of valley evolution.
I hope my answer helped you in someways
</span>
3 0
3 years ago
Jaden is a student in biology. He was talking with his classmates about how many hours of sleep they get each night. Students sh
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Answer:

Questions need to have independent variable and dependent variable.

independent variable in this case would be :

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