Answer:
the red flower gene is dominant, white is recessive, the cross was RR x rr yielding 4 Rr crosses with red flowers.
Explanation:
An action potential is an excitatory presynaptic nerve. An EPSP (Excitatory postsynaptic potential) takes place in the dendrites of the postsynaptic nerve. This spreads passively to the axon hillock. Depolarization of this region opens voltage-gated ionic channels. Sufficient membrane depolarization to threshold opens enough to these channels to produce an action potential.
Non myelinated axon; the currents associated with the action potential spread to the depolarized region of the axon.
In myelinated axon; the currents associated with the action potential spread to the next Node of Ranvier.
The action potential travels down the axon to the axon terminals.
Yes, everyone can have benefits from having a dietician
Answer:
This question is incomplete, the options are:
A. Two copies of the allele that determines phenotype whenever the allele is present
B. Two copies of the allele whose effect is hidden unless the other allele is absent
C. One copy of the allele that determines phenotype when present and one copy of the other allele
D. One copy of each of two alleles that both contribute equally to determining phenotype
The answer is B.
Explanation:
According to Gregor Mendel, a Gene comes in two alternative forms called ALLELES. One allele called the DOMINANT ALLELE is capable of masking the phenotypic expression of the other called the RECESSIVE ALLELE. The dominant allele will always express itself whenever it is present. However, a recessive trait will only be expressed when two alleles for recessiveness occur in the gene.
An individual whose genotype is for the recessive allele will have two copies of the allele whose effect is hidden unless the other allele is absent. This means that in that particular gene, the two present alleles will be recessive alleles.
RNA splicing was first discovered in 1970s in viruses and subsequently in eukaryotes. Not long after, scientists discovered alternative patterns of pre-mRNA splicing that produced different mature mRNAs containing various combinations of exons from a single precursor mRNA. The first example of alternative splicing of a cellular gene in eukaryotes was identified in the IgM gene, a member of the immunoglobulin superfamily. Alternative splicing (AS) therefore is a process by which exons or portions of exons or noncoding regions within a pre-mRNA transcript are differentially joined or skipped, resulting in multiple protein isoforms being encoded by a single gene. This mechanism increases the informational diversity and functional capacity of a gene during post-transcriptional processing and provides an opportunity for gene regulation
