Question
What type of chromosomal abnormality leads to the phenotype known as Down syndrome? a) trisomy 21b) monosomy 21c) monosomy 22d) trisomy 22e) disomy 21
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In humans, we are diploid organisms, meaning we have 23 pairs of homologous chromosomes. Each homologous chromosome has two copies, one from the mother and one from the father. Show more…
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Trisomy 21 (Down syndrome) can result from a. None of the other choices is valid b. 4 extra chromosome sets of haploid genome are present. c. Sex chromosomes trisomy d. Sex chromosome diploidy e. Structural abnormalities in the mitochondria
Trisomy of chromosome 21 is called a. Down syndrome. b. Klinefelter syndrome. c. Turner syndrome. d. Jacobs syndrome.
Down's syndrome occurs due to the gain in cxtra copy of (a) Chromosome 19 (b) Chromosome 5 (c) Chromosome 21 (d) Chromosome 24
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