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

Answer: Human chromosomes 13, 14,15 and 21, 22 have satellites.

Explanation:

The short chromosome arm is designated p (petite) and the long arm q (one letter after p). Certain human chromosomes may also contain a secondary constriction, which appears as an unstained gap (also called a satellite stalk) near the tip. The chromosomal segment distal to this gap appears as a satellite.

Chromosome numbers 13–15 (D group) and 21–22 (G group) have satellites.

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.