HEREDITY
NONDISJUNCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When a segment of a chromosome breaks off.
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When a segment of a chromosome breaks off, flips, and reattaches.
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When a segment of a chromosome is copied or doubles.
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When a segment of a chromosome breaks and attaches to a non homologous chromosome.
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When entire chromosomes don’t separate evenly during meiosis.
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Detailed explanation-1: -Deletions occur when a chromosome breaks and some genetic material is lost. Deletions can be large or small, and can occur anywhere along a chromosome. Duplications. Duplications occur when part of a chromosome is abnormally copied (duplicated).
Detailed explanation-2: -A genetic change in which a piece of one chromosome breaks off and attaches to another chromosome.
Detailed explanation-3: -A deletion, as related to genomics, is a type of mutation that involves the loss of one or more nucleotides from a segment of DNA. A deletion can involve the loss of any number of nucleotides, from a single nucleotide to an entire piece of a chromosome. National Human Genome Research Institute.
Detailed explanation-4: -A translocation occurs when a piece of one chromosome breaks off and attaches to another chromosome. Deletions occur when a portion of the chromosome breaks and genetic material is lost or deleted.
Detailed explanation-5: -Examples of chromosomal deletion syndromes include 5p-Deletion (cri du chat syndrome), 4p-Deletion (Wolf–Hirschhorn syndrome), Prader–Willi syndrome, and Angelman syndrome.