In the absence of repair, what would the replication of a double helix containing a mismatch yield? Group of answer choices a. one .DNA molecule with the normal sequence and one DNA molecule with a mutated sequence b. one DNA molecule with the normal sequence and one DNA molecule with a mismatch c. two DNA molecules with a mutated sequence two DNA molecules containing the mismatch d. two DNA molecules containing different mismatches at the site of the original error

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation:

they fuse to form they have half as many chromosomes as a somatic cell of the same individual. b

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.

answer: dna

because all cells have genes