Answer:
Peter's parents genotypes: hh and hh
Peter's possible genotypes: HH or Hh
Gretchen's concern: The legitimacy of Peter's parent is doubtful
Explanation:
Assuming hairy shoulders allele is represented by H and non-hairy shoulder allele by h. H is dominant over h, hence, for someone to have a hairy shoulder, he/she must posses one H allele (Hh or HH).
Peter's parents do not have hairy shoulders, hence their genotypes will be hh and hh.
Peter has hairy shoulder, hence, his genotype is either HH or Hh.
Gretchen is concerned because neither of Peter's parents have hairy shoulder. This means neither of the parents have the hairy shoulder allele (H). The concern of Gretchen would be about the source of Peter's hairy shoulder allele. If neither of the supposed parents have the allele, where did he get his allele from?
The legitimacy of Peter's parents is questionable and this is why Gretchen is concerned.
All organisms need air. There are organisms called anaerobic organisms that don’t need oxygen, but all organisms need air.
Cyanobacteria helped produce O2. Because it helped releasing O2 into the atmosphere, today we see different animals because Cyanobacteria helped reduce the poor oxygen in the atmosphere.
ALdosterone promotes the homeostasis of ions by causing the kidneys to absorb more sodium ions and secrete potassium ions.
What is ALdosterone ?
An adrenal cortex-produced steroid hormone (the outer layer of the adrenal gland). By retaining sodium inside and releasing potassium from the body, it aids in maintaining the proper balance of water and salts in the kidney. High blood pressure and a buildup of fluid in body tissues can result from an excess of aldosterone.
A hormone that controls both sodium and potassium ions is aldosterone. The kidney is stimulated to absorb more sodium ions and excrete potassium ions when the aldosterone hormone is released. The hormone aldosterone is secreted as a result of the following bodily situations.
To learn more about homeostasis click on the link below:
brainly.com/question/1046675
#SPJ4