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Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
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DeltaHQ DeltaHQ
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7 years ago
1) A child born to a perfectly healthy family was diagnosed with a rare disease.  After abnormal behavior in the child, the family decided to get his DNA checked via 23andme company and also consult an oncology doctor.  The child was diagnosed with chronic myelogenous leukemia. When the sequence of his DNA was retrieved, the doctors told the parents of the child that the chromosomal sequence of the child was different than his parents. In fact, especially one of the chromosomes (chromosome 8) looked extensively long (like chromosome 1).  How could this child acquire this kind of extension in the chromosome?   

2)What are the two terminators in prokaryotes and how do they work to stop transcription?
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6 years ago
Chromosome defects occur during meiosis, and while this condition is congenital, parents have this issue isn't a prerequisite to having such a condition. During meiosis II, the cell officially goes from being diploid to haploid. This happens because the sister chromatids split at this stage. As a result of crossing over, sometimes the chromosomes may not split properly in the synapse. Shown in the picture is a deletion of one chromosome and the elongation of the other.
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bio_manbio_man
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6 years ago
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This verified answer contains over 170 words.
Source  https://en.wikipedia.org/wiki/Terminator_(genetics)#Terminators_in_prokaryotes
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