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hjlf
3 years ago
12

What type of gene mutation is shown in the image?

Biology
1 answer:
OleMash [197]3 years ago
5 0

Answer:B.) Substitution

Explanation: Mutations are permanent changes in the nucleotide sequence of a DNA molecule. Substitution leads to a point mutation if only one nucleotide is replaced by another.

A substitution mutation occurs when one or more nucleotides in a DNA sequence is replaced by another nucleotide.

Example of substitution is in sickle cell hemoglobin in which valine replaces glutamate at position six in the two beta chains of hemoglobin. In a normal hemoglobin, the two beta chains of hemoglobin have glutamate at the sixth position but in a sickle cell hemoglobin, valine is found at position six on the two beta chains. This is also an example of a point mutation.

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Why is it important for the skull to have holes through the bone
garri49 [273]

Answer:

it is important for the skills to have hole thought the bone because it is used to relieve pressure on the brain when fluid, such as blood builds up and starts to compress bone tissues

5 0
3 years ago
Knowing that some individuals from Island 1 colonized Island 2, biologists sample the Mainland and two Island populations fifty
raketka [301]

Answer:

The evolutionary mechanism that could be influencing the allele frequencies between both islands and the mainland population might be Founder Effect.

Explanation:

Genetic drift is the random change that occurs in the allelic frequency of a population through generations. The magnitude of this change is inversely related to the size of the original population. These changes produced by genetic drift accumulate in time and eventually, some alleles get lost, while some others might set. Genetic drift affects a population and reduces its size dramatically due to a disaster -bottleneck effect- or because of a population split -founder effect-. In <u>founder effect</u>, a new population originates when a few individuals who are coming from a bigger population carrying its genes, settle down in a new area and reproduce. This small population might or might not be genetically representative of the original one. Some rare alleles might be exceeded or might be completely lost. Consequently, when the small population increases in size, it will have a genetically different composition from the original one. In these situations, <u>genetic variability is reduced</u> and there exists the possibility of developing a peculiar allelic composition. If the number of individuals that originated the new population is low, the founder effect will be very extreme, because the effects of the genetic drift are inversely proportional to the original number of individuals.  

<em>In the exposed situation, the evolutionary mechanism that could be influencing the allele frequencies between both islands and the mainland population might be Founder Effect. The fact that both islands are similar in their frequencies might be due to little genetic variation on island 1, or because dispersion to island 2 is a recent event on time. </em>

5 0
2 years ago
Explain how diffusion limits the size of a cell.
statuscvo [17]
Surface to volume i think
5 0
3 years ago
As the nurse is shaving a patient who is 2 days postoperative from a thyroidectomy, the patient has a spasm of the facial muscle
nadya68 [22]

The nurse should recognize this as Chvostek sign.

<h3>What is Chvostek sign?</h3>

A clinical indication that someone may have low blood calcium levels is the Chvostek sign (a decreased serum calcium, called hypocalcemia). The aberrant twitching of muscles that are stimulated (innervated) by the facial nerve  (also known as Cranial Nerve Seven, or CNVII) is known as the Chvostek sign.

The facial muscles on the same side of the face will occasionally contract when the facial nerve is touched in front of the ear (called ipsilateral facial spasm). Frequently, the muscles that regulate the nose, lips, and brows will spasm.

To learn more about Chvostek sign with the help of given link:

brainly.com/question/14055210

#SPJ4

8 0
1 year ago
DNA is a type of ?
Y_Kistochka [10]
B. DNA is short for <span>Deoxyribo nucleic acid, which is nucleic acid..

If this helped please rate, thank, and give brainliest answer!</span>
4 0
3 years ago
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