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3 years ago

Sometimes the sequence of dna gets mutated and an adenine is paired to a cytosine. Why is this interaction unstable?

Biology

1 answer:

kirza4 [7]3 years ago

4 0

Answer;

-Because the chemical groups that form hydrogen bonds are in the wrong positions.

Explanation;

-A base pair is any of the pairs of nucleotides connecting the complementary strands of a molecule of DNA or RNA and consisting of a purine linked to a pyrimidine by hydrogen bonds.

-The base pairs are adenine-thymine and guanine-cytosine in DNA, and adenine-uracil and guanine-cytosine in RNA or in hybrid DNA-RNA pairing. A mutation in the sequence of DNA that makes an adenine to be paired with a cytosine results to an unstable interaction because the chemical groups that form hydrogen bonds are in the wrong positions.

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Choose all that apply.

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A situation in which the coefficient of coincidence is greater than 1.0 would indicate that: A. no double crossovers were found

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Answer:

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Explanation:

Crossing over or recombination can be defined as the exchange of genetic material between homologous chromosomes during meiosis. Moreover, the coefficient of coincidence is the number of double recombinants found in the progeny. The coefficient of coincidence can be estimated by the following equation:

Coefficient of coincidence (COC) = ADRF / EDRF

where ADRF = Actual Double Recombinant Frequency

and EDRF = Expected Double Recombinant Frequency

In the case above described, ADFR is higher than EDRF, and therefore COC will be higher than 1.

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