Answer:
The offsprings will express the dominant trait of the male parent.
To understand this, lets make a punnet square. Let's consider the dominant alleles of the male parent to be DD and the recessive alleles of the female parent to be dd.
d d
D Dd Dd
D Dd Dd
The results from the punnet square depict that all the offsprings will have a heterozygous genotype but ad the dominant allele masks the effect of the recessive allele hence, the offsprings will show the phenotype of the dominant allele.
Answer:
This question lacks options, the options are:
a. Presynaptic; Ca2+ ions
b. Postsynaptic; Ca2+ ions.
c. postsynaptic; neurotransmitters
d. presynaptic; neurotransmitters
e. dendritic; neurotransmitters
The correct answer is d. Tetrahydrocannabinol, the active ingredient in marijuana, binds to receptors located in the <u>presynaptic</u> terminals of certain brain neurons. It lowers the likelihood that these neurons will release <u>neurotransmitters</u>
.
Explanation:
Tetrahydrocannabinol is the most abundant cannabinoid in most cannabis varieties and has the most potent psychoactive effect. Conventional neurotransmitters are water-soluble substances stored in small vesicles at the thin ends of the axon (presynaptic terminals). When a neuron generates an impulse by sending an electrical signal along the axon to the presynaptic terminals, the neurotransmitters are released from the vesicles, diffuse through a narrow intercellular space (synaptic cleft) and interact with the receptors on the surface of the recipient neuron (postsynaptic neuron). Cannabinoids cause a decrease in the release of neurotransmitters from the presynaptic terminal through the inhibition of Ca++ channels. This signaling is mediated by the βγ subunit of the G protein. The βγ subunit of the G protein inhibits the Ca channels of type N and P / Q, which are the majority in presynaptic neurons.
Answer:
The unsuspected intrinsic property of melanin to absorb the full electromagnetic spectrum, visible and invisible; dissipating absorbed energy in non-radiative manner through the dissociation of water molecule, like chlorophyll in plants; implies a new paradigm in cell biology, because signify that our body is able to
Explanation:
Answer:
This is because crossing over occurs between two homologous chromosomes. It involves an exchange of segments of their arms of the two chromosomes during Metaphase I of meiosis. Genes on the different chromosomes are, therefore, more likely to be crossed over than genes on the same chromosome. In addition, because sections of the arms are exchanged, genes that are close to each other on the same chromosome are more likely to be exchanged together (these are called linked genes) than genes that are far apart on the same chromosome.
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