Answer:
The chromatin structure undergoes various modification for proper gene expression. Histone acetylation, histone deacetylation, methylation and sumoylation are important for the epigenetics.
Epigenetics may be defined as the change in the genome that affect gene activity, its expression and heritable phenotypic change of the organisms. The DNA sequence is not altered in the epigenetic modification but the gene expression has been modified by methylation or acetylation.
Answer:
adrenal
Explanation:
The adrenal glands are two endocrine glands in the human body. They are located above the kidneys. Members of the endocrine system, the adrenal glands are very important to the human body because they make hormones essential for their functioning.
These glands are also responsible for the production of hormones that act on the transformation of fat into glucose by the liver. An example of this hormone is glucocorticoid known as cortisol, which also acts on the degradation of triglycerides. These functions are also performed by the region of the adrenal cortex.
The adrenal glands also produce in the adrenal medulla two other important hormones: adrenaline (also known as epinephrine) and norepinephrine (also known as norepinephrine). These two hormones act on psychic and physical reactions generated by strong emotional situations (mainly related to emotional stress).
Answer:
The male's genotype is MmRrBb.
Explanation:
The dominant allele R causes solid tail color, and the recessive allele r results in white spots on a colored background.
The black coat color allele B is dominant to the brown allele b
But these genes can only be expressed if the animal has an mm genotype at a third gene locus. Animals that are M_ are yellow regardless of which allele from the B locus is present.
A mating between a solid yellow-tailed male yawn cat and a solid brown-tailed female yawncat
the offspring:
6 M_R_ solid yellow
2 M_rr spotted yellow
3 mmR_B_ solid black
1 mmrrB_ spotted black
3mmR_bb solid brown
1mmrrbb
Since the female's genotype is mmR_bb. To produce offspring with these varying genotypes; each parent contributes one copy each. Since the male is a solid yellow, we can say part of his genotype is: M_R_.
Among the offspring, there is the presence of the dominant B allele, thus we can assume his genotype to be: M_R_B_.
Among the offspring, we have those that express the black and brown colour and to get the brown colour (b), the two parents must possess a copy each of both the m that allows expression and b that allows for brown colour. Thus the male genotype is: MmR_Bb.
There are also spotted ones among that can express this trait when both parent possess one copy each of r allele. Thus the male's genotype is MmRrBb.
Thus the mating will be between MmRrBb and mmR_bb to produce those stes of progeny.
Answer: The skeletal system is similar to a wooden framework house because both are built built to provide a structual housing for something. The house provides a shelter for a person and the skeleton provides a sheltor for organs.
Explanation: