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LuckyWell [14K]
3 years ago
15

This bonds to adenine (A) in DNA.

Biology
2 answers:
malfutka [58]3 years ago
8 0

Answer:

Thymine

Explanation:

Deoxyribonuceic acid (DNA), is the stored form of genetic material in an organism's cell. It is one of the two types of nucleic acid, made up of nucleotide sequences. A nucleotide is a combination of a five-carbon sugar (Deoxyribose in DNA), phosphate group and nitrogenous base.

A DNA molecule consists of two long polynucleotide chains composed of four types of nucleotide subunits (Adenine, Thymine, Guanine, and Cytosine). Each of these chains is known as DNA strand. The nitrogenous bases in DNA align with each other in a manner called base pairing.

Complementary base pairing is the phenomenon whereby in DNA, Adenine (A) always hydrogen bonds to Thymine (T), while Guanine (G) bonds to Cytosine (C) i.e. A-T, G-C . In complementary base pairing, a purine (Adenine and Guanine) always binds to a pyrimidine (Cytosine and Thymine). This pairing is responsible for the double-helical structure of the DNA.

jek_recluse [69]3 years ago
3 0
 chemistry of the nitrogenous bases are really the key to  function the DNA<span>.  something called complementary base pairing. cytosine can forms three hydrogen </span>bonds<span> with guanine, and </span>adenine<span> can form two hydrogen </span>bonds<span> with thymine.</span>
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According to the question, A man with brown eyes and red hair will possibly possess genotypes: BBdd or Bbdd while a woman with blue eyes and dark hair will possibly have genotype: bbDD or bbDd. Considering the fact that they produced children with recessive traits for both gene (blue eyes and red hair), it means that they are heterozygous for their dominant trait. This means that the ideal genotype for the man is Bbdd since he will produce gametes containing B and b alleles for the first gene while the ideal genotype for the woman is bbDd since it will produce gametes with D and d allele for the second gene.

Hence, a child with brown eyes and red hair will possess genotype: Bbdd since he/she cannot receive two dominant alleles for the first gene from both parents. A child with blue eyes and dark hair will have genotype: bbDd since he/she cannot receive two dominant alleles of the second gene from both parents.

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