Chromosomal Abnormalities and Terminology

The video tutorial explains various chromosomal conditions, starting with normal diploid chromosome counts in males and females. It then discusses chromosomal abnormalities such as monosomy, aneuploidy, double monosomy, double trisomy, anomy, and tetrasomy, providing examples for each condition. The tutorial highlights the impact of missing or extra chromosomes on an individual's genetic makeup.

What is the chromosome composition of a normal female?

• 46 chromosomes, 44 autosomes, XX

• 46 chromosomes, 44 autosomes, XY

• 44 chromosomes, 46 autosomes, XX

• 44 chromosomes, 46 autosomes, XY

What is the term for having only one copy of a chromosome?

• Trisomy

• Monosomy

• Tetrasomy

• Nullisomy

What does trisomy 21 indicate?

• Two copies of chromosome 21

• A third copy of chromosome 21

• A missing copy of chromosome 21

• Four copies of chromosome 21

What is double monosomy?

• Having two extra chromosomes

• Missing two different chromosomes

• Having four copies of a chromosome

• Having one extra chromosome

What is the chromosome count in a double trisomy?

• 50 chromosomes

• 48 chromosomes

• 46 chromosomes

• 44 chromosomes

What does nullisomy mean?

• Having no copies of a chromosome

• Having one copy of a chromosome

• Having three copies of a chromosome

• Having four copies of a chromosome

What is tetrasomy?

• Having no copies of a chromosome

• Having two copies of a chromosome

• Having three copies of a chromosome

• Having four copies of a chromosome