AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

GENE MUTATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A piece of one chromosome detaches and reattaches to a different chromosome
A
deletion
B
duplication
C
inversion
D
translocation
Explanation: 

Detailed explanation-1: -A translocation occurs when a piece of one chromosome breaks off and attaches to another chromosome. This type of rearrangement is described as balanced if no genetic material is gained or lost in the cell. If there is a gain or loss of genetic material, the translocation is described as unbalanced .

Detailed explanation-2: -A genetic change in which a piece of one chromosome breaks off and attaches to another chromosome. Sometimes pieces from two different chromosomes will trade places with each other. Translocations may lead to medical problems such as leukemia, breast cancer, schizophrenia, muscular dystrophy, and Down syndrome.

Detailed explanation-3: -1. simple translocations (one break involved) 2. reciprocal translocations (two breaks involved) 3. shift type translocations (three breaks involved) 4.

Detailed explanation-4: -In heredity: Translocations. If a chromosome break occurs in each of two nonhomologous chromosomes and the two breaks rejoin in a new arrangement, the new segment is called a translocation.

Detailed explanation-5: -Translocation Mutation Example For example, a person may have a balanced translocation between chromosomes 7 and 21. The q arms of each chromosome have been switched. But this person has all the genetic material required for normal protein synthesis and function.

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