Answer:
a) What are the parental genotypes? RRSS and rrss
b) What are the F2 genotypes and phenotypes?
F2) 3/16 RRSS + RRSs (red, smooth)
6/16 RrSS + RrSs (pink, smooth)
3/16 rrSS + rrSs (white, smooth)
2/16 Rrss (pink, rough)
1/16 RRss (red, rough)
1/16 rrss (white, rough)
c) What conclusions can be made about the allelic and gene interactions for both the petal color and texture alleles? For petal color, it occurs incomplete dominance, being R the dominant allele for red and r the recessive allele for white, together expressing pink in heterozygosis. For texture, it occurs complete dominance of the allele codifying for smooth, S, over the allele codifying for rough, s.
Explanation:
Due to technical problems, you will find the complete answer and explanation in the attached files.
The responses observed in type IV hypersensitivities result from the action of T cells and phagocytes.
Hypersensitivity IV type, also called delayed-type hypersensitivity (DTH), involves T cell-antigen interactions that cause activation and secretion of cytokines. This type of hypersensitivity requires sensitized lymphocytes that respond 24–48 hours after exposure to soluble antigens. A type IV hypersensitivity reaction is a cell-mediated reaction that can occur in response to contact with certain allergens, resulting in what is called contact dermatitis, or in response to certain diagnostic procedures such as the tuberculin skin test. Certain allergens need to be avoided to treat this condition. Type IV hypersensitivity response is observed results from the action of T cells and macrophages while other types are mediated by antibodies. This reaction occurs at least 1–3 days after the initial exposure. Type IV hypersensitivity is the mechanism of many autoimmune disorders.
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Answer:
Abiotic factors will Define which organisms are able or not to live in a specified place. The living organisms will constitute the biotic factors, which Define if and how can an organism live in a specified environment. So, the abiotic factors are controlling the biotic factors of an environment.
Explanation:
Answer:
The correct option is D. All of the above.
Explanation:
known mutagens in today’s conventional diet includes:
1.)Nitrates and nitrites (N-nitrosamines), naturally occurring chemical compounds that are legal preservatives used to suppress harmful bacteria in a variety of cured meats and some cheeses.
2.)Polycyclic aromatic hydrocarbons (PAHs); food contamination by PAHs arises from processing of food (drying, smoking) and cooking of food at high temperatures (grilling, frying, roasting).
3.) Heterocyclic amines (HCAs), many of which are present in burnt and charred foods, especially blackened meat.