When there is a well-established segment of heterochromatin on an interphase chromosome, there is usually a special barrier sequence that prevents the heterochromatin from expanding along the entire chromosome. gene a, which is normally expressed, has been moved by dna recombination near an area of heterochromatin. none of the daughter cells produced after this recombination event express gene a, even though its dna sequence is unchanged. what is the best way to describe what has happened to the function of gene a in these cells?

epigenetic inheritance

Explanation:

Epigenetic inheritance refers to characteristics of uni and multicellular organisms that are stable during the various cell divisions but do not involve changes in the organism's DNA sequence, similar to what happened with the cells shown in the above question regarding gene A. More simply, epigenetic inheritance is about parent-to-child experiences that do not occur through DNA.

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.

step 1 ammonium can be absorbed by plants, but some is converted into nitrates which are better for plants to absorb. this is called nitrification. 2. step 2 the deer eats the plants and uses the nitrogen-containing proteins for cell growth. 3. step 3 bacteria in the soil conduct nitrogen fixation to convert nitrogen gas from the atmosphere into ammonium. 4. step 4 some of the nitrates are absorbed back into plants, but denitrification breaks down the nitrates into nitrogen gas released back into the atmosphere. 5. step 5 nitrogen is found in the urine, which gets broken down into ammonium through the process of ammonification. 6. step 6 plants absorb the ammonium and begin assimilation, the process to add the nitrogen to protein.