All categories

3 years ago

Many different types of mutations can occur within the body. An individual experiences a mutation that changes a base in

Biology

2 answers:

olga nikolaevna [1]3 years ago

6 0

Answer:

A. Silent, The type of mutation responsible for changing a base in the mRNA strand, without changing the coding aminoacid or protein, is called a silent mutation.

Explanation:

In a silent mutation occurs the change of a nitrogenous base in one of the codons that encodes an aminoacid, without changing the aminoacid or altering the structure or function of the protein to be synthesized.

In this type of mutations the change of the base does not mean the change of the aminoacid, because some aminoacids can be coded with more than one codon. In the case of Leucine, the codons that encode it are CUU, CUC, CUG or CUA, so even if a base changes, the final protein will be the correct one.

For the other options:

Missense: the change of the base in the DNA chain implies the change of the codon in the mRNA and of the encoded aminoacid, in that way a structural and functional alteration of the synthesized protein occurs.

Nonsense: the change in the nitrogenous base in the DNA leads to the coding of a termination codon, so that the protein is ultimately incomplete.

Insertion: in this case there is the addition of more nitrogenous bases to the DNA chain, with respect to the original one.

fenix001 [56]3 years ago

5 0

Answer:

Silent

Explanation:

Edge 2021

You might be interested in

***HELP*** What is the role of a keystone species?

kumpel [21]

Answer:

<h2>D. Competitively dominant to other organisms in the ecosystem</h2>

A keystone species is an organism that helps define an entire ecosystem. Without its keystone species, the ecosystem would be dramatically different or cease to exist altogether.

Hope that helps! :)

-Aphrodite

Explanation:

5 0

3 years ago

To check whether Earnest and Denise could have a baby with Type O blood, draw a Punnett square for a father who has blood Type A

Nutka1998 [239]

Answer:

Answer is explained below and also see the document attached below for Punnett square.

Explanation:

ABO blood type (A, B, AB, or O) is based on the presence (or absence) of the A and B antigens in the red blood cells. The blood type, A has only the A antigen (and has anti-B antibodies) while the blood type, B has only the B antigen (and had anti-A antibodies). Also in the AB blood type, both A and B antigens are present (but has no antibodies) while in the O blood type, both A and B antigens are absent (but has both antibodies).

The blood type is inherited from the parents and the offspring inherits one of the two alleles from each parent. The ABO blood type has three types of alleles: IA, IB, and i. Here, I is a term for antigen (isoagglutinogen).

The IA and IB alleles are dominant while the i allele is recessive. The blood type A is formed by either two IA alleles (IA IA ) or IA i. So, the genotype of blood type A is IA IA or IA i. The blood type B is formed by either two IB alleles (IB IB ) or IB i. So, the genotype of blood type B is IB IB or IB i. The O blood type is formed only by two i alleles (ii). So, the genotype of blood type O is ii. The IA and IB alleles (IA IB) give the AB blood type, which is an example of codominance (the traits of both the alleles are visible in the phenotype). The genotype of blood type AB is IA IB.

If the parents have blood type A and B, then they can have an AB blood type offspring. If the parents have blood type A and B and they both are heterozygous (IB i and IA i), then they can also have a O blood type child.

Here, the father has blood Type A (IA i genotype) while the mother has blood Type B (IB i genotype). Both the parents are heterozygous (IB i and IAi), so the possible genotypes of their child are IA IB (blood type AB), IA i (blood type A), IB i (blood type B) and ii (blood type O).

i.e., Blood Type Genotype

A IA IA or IA i

B IB IB or IB i

AB IA IB

O ii

Download doc

3 0

4 years ago

Light energy from the sun is the primary source for all living organisms. So how does the sun provide energy for all living orga

Vera_Pavlovna [14]

Answer: Heat or thermal energy coming from the sun provides energy for living organisms through heat transfer. For plants light energy is absorbed by the leaves and enters the stomata which activates the thylakoids and releases amount of electrons for chemical reactions. Through light energy plants produces glucose and releases oxygen gas as a by-product of the reaction. For this process energy is formed (ATP)

Explanation:

6 0

3 years ago

What are brodmann areas and how do they relate to the neurological deficits that occur as the result of stroke?.

Viefleur [7K]

The Brodmann areas are a method of mapping the cortex and its distinct functions that was developed by Korbinian Brodmann, after whom the areas are named.

Korbinian Brodmann (November 17, 1868 – August 22, 1918) was a German neurologist best known for classifying the cerebral cortex into 52 distinct regions based on cytoarchitectonic (histological) characteristics. These areas are now commonly known as Brodmann areas.

The Brodmann classification divides the cortex into approximately 52 sequentially numbered areas, though some regions have since been subdivided and others are only found in non-human primates.

It is in charge of motor movements such as contralateral finger/hand/wrist or orofacial movements, learned motor sequences, breathing control, and voluntary blinking. The primary visual cortex (Brodmann area 17) is located on the medial surface of the occipital lobe, in and on either side of the calcarine sulcus.

To learn more about Brodmann areas, here

brainly.com/question/15837481

#SPJ4

3 0

1 year ago

How does carrying capacity limit population numbers?

Nina [5.8K]

Answer:

Carrying capacity, the average population density or population size of a species below which its numbers tend to increase and above which its numbers tend to decrease because of shortages of resources.

Explanation:

hope it help to you

5 0

3 years ago