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Anvisha [2.4K]
3 years ago
12

The expression of a gene is said to be ‘turned on’ when certain signals interact with the promoter of a gene and RNA is prod

uced. The strand of RNA that corresponds to a gene is complementary to the sequence of DNA. The process called "Transcription" is:
Biology
1 answer:
marusya05 [52]3 years ago
5 0

Answer:

Explanation:

the process of transcription is defined as a process by which cells are able to allow for expression of their genes. this involves how DNA is read and written into RNA (mainly messenger RNA). mRNA production then guides the synthesis of various proteins. the process of transcription occurs in three stages which include initiation, elongation and termination. when certain signals interact with the promoter of a gene, transcription is initiated allowing for some regions of the DNA to be transcribed in the 5 to 3' direction. such that the newly synthesized strand of mRNA is complementary to the non coding sequence. Controlling the production of mRNA in the nucleus allows the regulation of gene expression.

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A population of 100 tigers has 30 with horizontal stripes. Using pedigrees, you ascertain that horizontal striping is caused by
bixtya [17]

Assuming that this population is in Hardy-Weinberg equilibrium, we can sayt that  <em>the</em><em> probability</em><em> that, given enough time, all tigers in the population will have horizontal stripes is</em><em> 30% = 0.3.</em>

--------------------------

<u>Available data:</u>

  • Population size, N = 100 tigers
  • Number of Tigers with horizontal stripes = 30
  • Horizontal stripes is caused by an autosomal recessive mutation.

We need to know the probability that all tigers in the population will have horizontal stripes, which is the recessive phenotype.

We assume that the population is in Hardy-Weinberg equilibrium, so there should be no evolution.

Since the population is in H-W equilibrium, the allelic, genotypic and phenotypic frequencies will remain the same generation after generation.

Now, we will calculate the allelic and genotypic frequencies of horizontal striped individuals in the population.

There are 100 individuals, and only 30 have horizontal stripes.

So, the phenotypic frequency, F(HS) is 30/100 = 0.3 = 30%

Since this is a recessive phenotype, this value equals the genotypic frequency, F(hh) = 30%

Finally, we can get the allelic frequency by taking the square root of this value.

F(hh) = q² = 0.3

f(h) = q = √0.3 = 0.55 = 55%

According to these calcs, the probability for the fixation of the recessive allele is 55%, and the probability that all individuals express the recessive horizontal stripes phenotype is 30%.

--------------------------

You can learn more about Hardy-Weinberg equilibrium at

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6 0
2 years ago
he discipline of microbiology is intimately associated with biochemistry and genetics, because cells are both biochemical cataly
Archy [21]

Answer:

True

Explanation:

<u>The discipline of microbiology has to do with the study of microorganisms - tiny organisms that cannot be seen with the ordinary eyes except with the microscope.</u>

<em>Within the cells of microorganisms just as in every other cell, various biochemical processes take place in order to ensure the continued viability of the cells. Genetic information are also passed on from parent to daughter cells during the process of reproduction or cell division.</em>

Hence, the field of microbiology is associated with both biochemistry and genetics.

6 0
3 years ago
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Natalka [10]
An electron transport chain (ETC) is a series of complexes that transfer electrons from electrondonors to electron acceptors via redox (both reduction and oxidation occurring simultaneously) reactions, and couples this electron transfer with the transfer of protons (H+ ions) across a membrane.
7 0
2 years ago
Assume all of the presynaptic synapses identified produce epsps. If two of these synapses fired simultaneously, which synaptic c
Sonja [21]

The synapses that are nearer to the axon hillock would bring the initial segment closest to the threshold based on spatial summation.

<h3>What is neuron synapsis?</h3>

In neurosciences, the term synapsis makes reference to the connection between two nerve cells (neurons).

Synapsis is produced by the connection between axons and dendrites among different neurons.

Spatial summation refers to the start (trigger) of the action potential in neurons via two or more presynaptic cells.

Learn more about neuron synapsis here:

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4 0
2 years ago
Explain why tides happen 50 minutes later each day
dmitriy555 [2]
With each<span> passing </span>day<span>, the high </span>tides occur<span> about an hour </span>later<span>. The moon rises about an hour </span>later each day<span>, too (actually, 54 </span>minutes later<span>). Since the moon pulls up the </span>tides<span>, these two delays are connected. As the earth rotates through one </span>day<span>, the moon moves in its orbit.</span>
5 0
2 years ago
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