Biology, 07.12.2020 17:10 3steves

A segment of DNA produces methionine, threonine, histidine, aspartate, and glycine when translated. A substitution mutation occurs and causes the synthesis of the segment as shown. New DNA Strand: 3' – TACAGGGTGCTACCCACT – 5' Which is the new peptide chain when the new DNA segment is translated?

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Answer from: xonyemaa12

AUGUCCCACGAUGGGUGA

Methionine- Serine- Histidine- Aspartate- Glycine- Stop

Explanation:

In gene expression, DNA, which is the genetic material is transcribed into mRNA, which is subsequently translated into a amino acid sequence (peptide). The transcription of DNA into mRNA follows complementary base pairing rule i.e. A-U, G-C, T-A.

The nucleotide sequence in the mRNA molecules are read in group of three nucleotide bases called CODONS. Each codon specifies an amino acid.

According to this question, a segment of DNA produces methionine, threonine, histidine, aspartate, and glycine when translated, however, a substitution mutation occurs and causes the synthesis of the segment as shown: 3' – TACAGGGTGCTACCCACT – 5'

The mRNA sequence from this mutated DNA sequence is as follows: AUGUCCCACGAUGGGUGA

During translation, the following codons specify the following amino acids:

AUG - methionine

UCC - Serine

CAC - Histidine

GAU - Aspartate

GGG - Glycine

UGA - Stop codon

Based on this, the new peptide chain when the new DNA segment is translated will be: Methionine- Serine- Histidine- Aspartate- Glycine- Stop

Answer from: Quest

Hahaha good one. you ? & oop

Answer from: Quest

The answer would be c, white eyes are homozygous recessive. in the early 1900s, morgan conducted several experiments with vinegar flies (drosophila). one sample revealed an anomaly: a white-eyed, single male fly. he attempted to breed this fly with the typical red-eyed females. the offspring were all red-eyed. using flies from this new generation (brother-sister pairs) produced some red-eyed and a few white-eyed flies. the white-eyed were all male. in later experiments, he was able to produce white-eyed females. this proved that white eyes are not lethal to either sex (ruling out a and b). since the percentage of white eyes to red eyes is so low, white eyes are not a dominant trait. it would be a recessive trait.

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A segment of DNA produces methionine, threonine, histidine, aspartate, and glycine when translated....

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