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stiks02 [169]
3 years ago
5

Identify two general ways chemical mutagens can alter dna.

Biology
1 answer:
gavmur [86]3 years ago
6 0
1) compound mutagens can go about as base analogs 
Analogs are perceived by DNA polymerase and consolidated into DNA set up of nucleotides and after that reason change by base-matching in a way that varies from the undifferentiated from nucleotide. For instance, 5-BrdU can be consolidated inverse An amid replication and after that combine as a C amid the following round of replication, making a TA CG change. 
2) substance mutagens can synthetically adjust base. 
Compound adjustment of bases changes their base-blending properties to such an extent that an altered purine will base-match with the wrong pyrimidine and the other way around. For instance, EMS is an alkylating operator that proselytes guanine to O6-methylguanine, which base-sets with T to make a GC to AT progress
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Why is freckles not X linked dominant trait
forsale [732]

Answer:

The presence of freckles in a individual, or predisposition to have them, is a trait that is inherited with an autosomal dominant pattern, and is not related to sex-linked inheritance.

Explanation:

Freckles are accumulations of melanin in the skin, which form small reddish or light brown spots, predominantly in white-skinned people.

<u> The melanocortin receptor gene</u> undergoes a change that gives rise to a variant - which is phenotypically expressed in the presence of freckles - whose inheritance has been determined to be autosomal dominant.

<u>Under no circumstances is the transmission of the gene that determines the presence of freckles linked to sex</u>, because is an autosomal trait, as is hair, eye or skin color.

Learn more:

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2. Identify How did Darwin explain the similarities among finches in the Galápagos
Studentka2010 [4]

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A flattened membrane sac inside the chloroplast used to convert light energy into chemical energy
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