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
![Check Mark](/static/check-mark.png)
Want to see the full answer?
Check out a sample textbook solution![Blurred answer](/static/blurred-answer.jpg)
- the 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_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_forwardWhich type(s) of chromosomal aberrations is/are likely to cause semisterility? Select all correct answers. A.)reciprocal translocations B.)deletions C.)inversions D.) duplicationsarrow_forward
- What 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_forwardWhat causes reciprocal translocation?arrow_forward
- Why is a chromosomal fragment without a centromeresubsequently lost and degraded?arrow_forwardWhat is deletion and duplication?arrow_forwardWhich of the following is NOT an example of a spontaneous mutation? A) errors in replication of DNA polymerase B) ALL of these are examples of spontaneous mutations C) covalent alteration of DNA by chemical products of fatty acid metabolism D) incorporation of a nucleotide analog during DNA synthesis E) failure to correct an apurinic site F) nondisjunction during meiosisarrow_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College
![Text book image](https://www.bartleby.com/isbn_cover_images/9781938168116/9781938168116_smallCoverImage.gif)