Multiple Choice
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.
Verified step by step guidance1
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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