In a monohybrid cross, if the gene for tall (t) plants was incompletely dominant over the gene for short (t) plants, what would be the predicted result of crossing an intermediate (tt) plant with a tall (tt) plant?

Half of the offsprings will be Intermediate (Tt), while the other half will be Tall (TT).

Explanation:

This is a typical monohybrid cross because it involves a single gene, which is coding for height in plant.

According to the question, the allele for tallness (T) is incompletely dominant over that of shortness (t).

Incomplete dominance is a phenomenon in inheritance that occurs when the two alleles of a gene seem equally effective in their influence on a trait i.e. a dominant allele does not completely mask the effects of the recessive allele in a heterozygous state, hence, the resulting offspring has a phenotype that shows the blending of both alleles.

In this case, the allele for tallness (T) could not completely mask the expression of the allele for shortness (t), hence, an offspring different from both parents results (intermediate).

In a cross between an intermediate plant (Tt) and a tall plant (TT). The alleles of each plant are first separated into gametes according to Mendel's law of segregation (See attached image for details).

Based on the cross in the image attached, among the offsprings expected to result, half (1/2 or 50%) of them are tall (TT) while the other half (1/2 or 50%) are intermediate (Tt).

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.