Concept explainers
A change in the DNA sequence of the cell is known as a mutation. Mutations often occur in two ways such as spontaneous mutations (which arise occasionally) and induced mutations (which arise from the exposure of mutagens). Mutations affect the
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ACHIEVE FOR HOW LIFE WORKS 3E (4-TERM)
- How do the linear chromosomes in eukaryotes ensure that its ends are replicated completely?arrow_forwardWhy are chromosomal aberrations considered to have less significance than gene mutations for subsequent generations?arrow_forwardthe deletion of which chromosome causes obvious morphological and mental defects in the organism, such as microcephaly, strabismus, major mental retardation and is known as the 'cri-du-chat' syndrome?arrow_forward
- What occurs during duplication chromosomal mutation?arrow_forwardSelect the statements below that are TRUE. Select 4 correct answer(s) Question 14 options: A) Mutations are induced to occur in response to a selective pressure. B) Crossover suppression occurs when no recombinant progeny are observed between two genes located within a homozygous paracentric inversion. C) The ends of each chromosome are replicated by an RNA-protein complex called telomerase. D) When a mismatched base pair occurs during DNA replication, mismatch repair corrects the mismatch by replacing the nucleotide on the template strand. E) Mutations occur spontaneously and so may be pre-existing in a population when a selective pressure arises. F) When two genes are linked, the frequency of recombinant types exceeds the frequency of parental types. G) The choice…arrow_forwardWhat is deletion and duplication?arrow_forward
- Which type(s) of chromosomal aberrations is/are likely to cause semisterility? Select all correct answers. A.)reciprocal translocations B.)deletions C.)inversions D.) duplicationsarrow_forwardWhat are some physical appearances of individuals affected by the abnormality structure of deletion, inversion, duplication, and translocation?arrow_forwardWhich of these chromosomal rearrangements will result in formation of a loop during prophase I if an organism is heterozygous for the chromosomal aberration? Select all correct answers. A.)reciprocal translocation B.)tandem duplication C.)Robertsonian translocation D.)pericentric inversion E.)paracentric inversionarrow_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College