Feedback inhibition is important to the human endocrine system because it tells the body that the response prevented the stimulus. For example if sensory receptors detect that there is a low blood sugar levels, the message will travel to the brain which will cause hormonal glands to release hormones, telling cells to release more glucose (sugar). Once the sugar levels reach normal levels, feedback inhibition occurs to tell the body that it has done enough already to increase blood sugar levels. If feedback inhibition did not occur, then the blood sugar levels could rise above normal levels.
Answer: The correct sequence in the expression of a trait is gene > protein > trait (Option B).
Explanation:
During gene transcription, a linear fragment of DNA referred to as a 'gene' is used as template to synthesize a complementary messenger RNA (mRNA) sequence.
Subsequently, this mRNA is then used as template to create a protein by a process called translation.
Moreover, phenotypic traits can be defined as all observable characteristics that an organism has.
The phenotypic traits are largely determined by the expression of either enzymatic or structural proteins, which interact to shape the phenotype of an organism.
In conclusion, the correct sequence in the expression of a trait is gene > protein > trait (Option B).
Answer:
All Offsprings will have a red flower and tall phenotype with a genotypic ratio of 1 RrTT : 1 RrTt
Explanation:
This is a cross involving two genes; one coding for rose color and the other for height in rose plant. The red allele (R) is dominant over the white allele (r) in the first gene while tallness (T) is dominant over shortness (t) in the second gene.
Based on this, a homozygous red and tall flower will possess a genotype: RRTT while a flower that is white and heterozygous tall will have genotype: rrTt. Hence, each parent's allele will separate into gametes independently of one another according to Mendel's law of independent assortment. The possible gametes combination are:
RRTT- RT, RT, RT, RT
rrTt- rT, rt, rT, rt.
Hence, using a punnet square (see attached image), all offsprings will possess the phenotypic dominant trait i.e. red and tall. The genotypes produced are: RrTT and RrTt in a ratio 1:1