Determine the correctness or otherwise of the following Assertion [a] and theReason [r].Assertion [a]: Chromosome mutations can change the structure of chromosomes.Reason [r]: All chromosome mutations arise due to nondisjunction ofchromosomes during mitosis or meiosis
Question
Determine the correctness or otherwise of the following Assertion [a] and theReason [r].Assertion [a]: Chromosome mutations can change the structure of chromosomes.Reason [r]: All chromosome mutations arise due to nondisjunction ofchromosomes during mitosis or meiosis
Solution
Assertion [a] is correct. Chromosome mutations can indeed change the structure of chromosomes. These mutations can involve deletions, duplications, inversions, or translocations of sections of the DNA sequence.
Reason [r] is partially correct. While it is true that nondisjunction during mitosis or meiosis can lead to chromosome mutations, it is not the only cause. Other factors such as exposure to certain chemicals or radiation can also cause chromosome mutations. Therefore, it is incorrect to state that all chromosome mutations arise due to nondisjunction.
Similar Questions
Which of the following statements is true about mutations?i. They can produce new alleles of existing genes.ii. They can be inherited if they are in somatic cells.iii. They may affect a single codon or a part of a chromosomeiv. They are always linked to diseasei, ii and iiii and iiiii and iiii, ii, iii and iv
Which of the following statements about mutations is TRUE?Select one alternative:Induced mutations occur naturally during DNA replication.Spontaneous mutations are always corrected by DNA repair enzymes.Mutagens increase the mutation rate above the spontaneous rate.Frame shift mutations mainly involve single base substitutions.
Mutation is an important evolutionary mechanism and occurs with a permanent change in a nucleotide sequence. Which statements about mutations are true? Select TWO correct answers.Select one or more:a.Mutations must occur in gametes in order to be passed onto offspring.b.Most mutations do not result in a phenotype that increases the individual's fitness.c.Mutations occur very rarely in organisms.d.All mutations are harmful.e.Mutations decrease genetic variation in a population.
When dealing with the concept of mutations in the first unit (i.e. heredity), what statement is incorrect about mutations? Question 21 options: Mutations do not impact the normal operations of the cell Carcinogens cause mutations to form Occur in sex cells (gametes) Mutations can often arise spontaneously.
One type of change in chromosomal structure is a deletion, which can occur when Blank______.Multiple select question.a chromosome segment is repeated in the same chromosomea chromosome segment has moved to a nonhomologous chromosometwo simultaneous breaks lead to the loss of an internal segmentthe end of a chromosome breaks offa chromosome segment is rotated 180 degrees
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.