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snow_tiger [21]
3 years ago
13

If someone who is homozygous for an autosomal recessive disorder mates with a person who does

Biology
1 answer:
Licemer1 [7]3 years ago
5 0

Answer:

have a zero percent chance of developing the disease

Explanation: example aa for disorder mates with AA (doesn't have the mutation), all offspring will be Aa.  Offspring will be a carrier of the autosomal recessive disorder but will not develop the disease

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The circulatory and respiratory systems work together to provide cells with oxygen and nutrients and remove waste products, such
Kipish [7]

Answer: It's c

Explanation:

When we need more oksigen our body reacts and make heart to beat more faster so there will be more blood circulating and will compensate the dyoksid carbon that is produce with oksigen

6 0
3 years ago
Explain the interaction that occurs between a t-helper lymphocyte and a b cell when the b cell is being induced to produce peanu
Paraphin [41]

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
Which of the following is NOT a characteristic of the northern boreal forest (taiga) biome?
Alik [6]

Answer: d. High biodiversity in the understory.

Explanation:

The taiga or boreal forests are the largest biome in the world. These can be found in the regions of North America, Alaska, and United States. These regions exhibit extreme weather conditions. Typically long winters and moderate to high precipitation. The soil is permafrost and nutrient poor as no new organic matter can be added up to the soil due to it's freezing condition. The plant growth is scanty and biodiversity is low because organisms are incapable of surviving in the harsh weather conditions.

8 0
3 years ago
How does the entire nervous system allow our bodies to interact with our world? Your response must include the following terms:
kobusy [5.1K]
A vast network of nerves sends electrical signals to and from other cells, glands, and muscles all over your body. These nerves receive information from the world around you. Then the nerves interpret the information and control your response.
5 0
2 years ago
Read 2 more answers
What do smooth muscle cells look like under a microscope?
ipn [44]
They are spindle shaped and have no striations.
6 0
2 years ago
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