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Identical copies of chromatin held together by cohesin at the centromere are called _____.
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6. Chromosomal Variation
Chromosomal Mutations: Aberrant Euploidy
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In humans, how are chromosome numbers assigned according to the size ordering system?
A
Chromosome 1 is the largest and numbers decrease with decreasing size.
B
Chromosome numbers are assigned randomly without regard to size.
C
Sex chromosomes are always numbered first because they are the largest.
D
Chromosome 22 is the largest and numbers increase with increasing size.
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Understand that human chromosomes are numbered based on their size, with the largest chromosome assigned the smallest number.
Recognize that chromosome 1 is the largest human chromosome, so it is assigned the number 1.
Know that the numbering continues in decreasing order of size, so chromosome 2 is the second largest, chromosome 3 the third largest, and so on.
Note that sex chromosomes (X and Y) are not included in this size-based numbering system; they are labeled separately.
Conclude that the correct system assigns chromosome numbers starting from the largest (chromosome 1) to the smallest (chromosome 22) based on size.
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