Chromosome Variation and Ploidy Concepts

The video tutorial covers the variation in chromosome numbers, focusing on aneuploidy and euploidy. Aneuploidy involves the addition or deletion of chromosomes, with types like monosomic, nullisomic, trisomic, and tetrasomic. Euploidy involves changes in complete sets of chromosomes, including haploidy and polyploidy. Examples such as Turner syndrome and Down syndrome are discussed, along with the occurrence of polyploidy in plants. The video concludes with a preview of the next topic, gene mutation.

What is the term used to describe the variation in chromosome number in a diploid cell?

• Aneuploidy

• Ploidy

• Euploidy

• Monosomy

What is the typical chromosome number in humans?

• 23

• 92

• 46

• 69

Which of the following is NOT a type of aneuploidy?

• Monosomic

• Polyploidy

• Nullisomic

• Trisomic

Aneuploidy arises due to the failure of separation of which type of chromosomes?

• Sister chromatids

• Non-homologous chromosomes

• Homologous chromosomes

• Autosomes

Which syndrome is an example of monosomic aneuploidy?

• Down syndrome

• Klinefelter syndrome

• Edwards syndrome

• Turner syndrome

What is the term for the addition of a complete set of chromosomes?

• Polyploidy

• Trisomy

• Monosomy

• Aneuploidy

In polyploidy, what is the term for an organism with three sets of chromosomes?

• Diploid

• Tetraploid

• Triploid

• Haploid

What is the result when a complete set of chromosomes is lost?

• Polyploidy

• Haploidy

• Diploidy

• Aneuploidy

Which of the following is a characteristic of polyploidy?

• Loss of a single chromosome

• More than two sets of chromosomes

• Loss of a chromosome pair

• Addition of a single chromosome

Which type of ploidy is commonly found in plants but rare in animals?

• Trisomy

• Polyploidy

• Monosomy

• Aneuploidy