The following karyotype is from a human baby with a genetic defect - VCE - SSCE Biology - Question 10 - 2010 - Paper 1
Question 10
The following karyotype is from a human baby with a genetic defect.
The condition indicated by the karyotype is an example of
A. monomy.
B. polyploidy.
C. inversion... show full transcript
Worked Solution & Example Answer:The following karyotype is from a human baby with a genetic defect - VCE - SSCE Biology - Question 10 - 2010 - Paper 1
Step 1
A. monomy.
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Answer
Monosomy refers to the presence of only one copy of a particular chromosome instead of the typical pair. This is not what is observed in the given karyotype.
Step 2
B. polyploidy.
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Answer
Polyploidy is a condition where an organism has more than two complete sets of chromosomes. The karyotype does not display such a condition.
Step 3
C. inversions.
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Inversions occur when a chromosome segment breaks off, flips around, and reattaches. The karyotype does not indicate this chromosomal rearrangement.
Step 4
D. trisomy.
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Answer
Trisomy is characterized by the presence of three copies of a chromosome instead of the usual two. The karyotype shows an extra chromosome, specifically chromosome 21, which is indicative of Down syndrome, a common type of trisomy.
