14. Some weed killers, insecticides, and food additives alter the DNA of certain cells. Because of this effect, these substances are known as 1) auxins 2) mutagens 3) meristems 4) autosomes 20. The genetic code of a DNA molecule is determined by a specific sequence of 1) ATP molecules 2) sugar molecules 3) chemical bonds 4) molecular bases 21. What determines the kind of genes an organism possesses? 1) type of amino acids in the cells of the organism 2) sequence of the subunits A, T, C, and G in the DNA of the organism 3) size of simple sugar molecules in the organs of the organism 4) shape of the protein molecules in the organelles of the organism
Genetic Recombination
Recombination is crucial to this process because it allows genes to be reassorted into diverse combinations. Genetic recombination is the process of combining genetic components from two different origins into a single unit. In prokaryotes, genetic recombination takes place by the unilateral transfer of deoxyribonucleic acid. It includes transduction, transformation, and conjugation. The genetic exchange occurring between homologous deoxyribonucleic acid sequences (DNA) from two different sources is termed general recombination. For this to happen, an identical sequence of the two recombining molecules is required. The process of genetic exchange which occurs in eukaryotes during sexual reproduction such as meiosis is an example of this type of genetic recombination.
Microbial Genetics
Genes are the functional units of heredity. They transfer characteristic information from parents to the offspring.
Because of this effect, these substances are know as 2). Mutagens.
Mutagen is an chemical or physical agent that usually affect the dna of an organism, mainly the genetic material. Thus, increases the level of mutation frequency.
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