Chromosome bands as observed Q-, G-, and R-staining method. Autosomes are number

Question

Chromosome bands as observed Q-, G-, and R-staining method. Autosomes are numbered in order from 1 to 22, Y and X are listed separately. Short arms of chromosomes are designated p and long arms q. Regions are numbered from 1 (next to centromere) to the distal end of each arm, and bands are numbered within the regions from the centromere end to the distal end of each arm. (Paris Conference (1971): Standardization in human cytogenetics. Birth Defects: Original Article Series: VIII[7], 1972, The National Foundation, New York.) short, distal, chromosomal portions are called satellites. (Do not confuse these chromosome satellites and secondary constrictions with satellite DNAs, which are a category of repetitive DNA.) Which of the human chromosomes have satellites?___

Explanation / Answer

In the ACROCENTRIC chromosome, the satellite dna is located in the short arm.

And basically satellites are the (black)strips or bands that are present on the end of the chromosomes.

ACROCENTRIC CHROMOSOME is that one in which centromere is not present in the center that is it is present near the one end of the chromosome which results in a short and long arms from the centromere.

Humans normally posses 5 pairs of such chromosomes.

In humans chromsome no. 13,14,15,21,22 are the SAT chromosome.

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