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anygoal [31]
2 years ago
10

In almost 70% of cystic fibrosis cases, a set of three base pairs is lost from chromosome 7. this results in the loss of an amin

o acid in the cftr gene, causing cystic fibrosis.
what type of mutation is described?
-deletion
-nondisjunction
-substitution
-translocation
Biology
1 answer:
Bess [88]2 years ago
4 0

Almost 70% of cystic fibrosis cases result in the loss of an amino acid in the CFTR gene, causing cystic fibrosis due to a deletion.

<h3>What is a mutation?</h3>

A mutation is any genetic alteration in the genetic material (DNA molecule) of the genome of an organism.

A deletion is a special type of mutation where nucleotide bases are lost from the genetic material.

Insertions and deletions are mutations collectively referred to as indels, whereas single nucleotide polymorphisms are called SNPs.

Learn more about mutations here:

brainly.com/question/17031191

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50% of the planets are made mainly of gas true or false
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Answer: I think the answer is true

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REAL ANSWERS PLEASE !!!<br> Describe the steps of transcription
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The various steps in the transcription and translation process of protein synthesis are described below.

Explanation:

Proteins (made up of amino acids) have an important role in the various functioning process of an organism. Protein synthesis which takes place in the cells of an organism consists of two major processes: transcription (DNA to RNA) and translation (RNA to protein).

Transcription: It is the first process in protein synthesis which occurs in the cell nucleus where a single-stranded messenger RNA (mRNA) is created using a DNA strand and the genetic instructions in DNA are transferred to this mRNA. The steps in transcription are initiation, elongation, and termination. The beginning process known as initiation occurs when an enzyme RNA polymerase binds to a promoter (region of a gene) and the DNA unwinds. One of the DNA strands acts as a template and the enzyme reads the bases in the template DNA strand.

The next step is elongation, where the RNA polymerase builds a strand of mRNA by the addition of nucleotides using complementary base pairs. Here, adenine (A) in the DNA binds to uracil (U) in the RNA. Termination is the last step in which the transcription process ends when the RNA polymerase comes across a termination sequence in the gene. Thus, the completed single-stranded mRNA detaches from DNA.

Translation: It is the second process in protein synthesis which occurs in the ribosome of the cell where the genetic information in mRNA is used to create a protein from amino acids. A triplet of nucleotides is called a codon and they define amino acids. There are 64 possible codons and the codon, AUG acts as the start codon which initiates translation in addition to specifying the amino acid methionine. In the initiation step, the first amino acid in the polypeptide chain is brought by transfer RNAs (tRNAs) to bind to the start codon of mRNA. During elongation, each type of tRNAs in the cytoplasm bound to a specific codon on the mRNA template and adds the corresponding amino acid to the polypeptide chain. Stop codons (UAA, UAG, or UGA) terminate protein synthesis and release the polypeptide.

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