Mistakes during Meiosis

What is the purpose of meiotic division?

• To double the number of chromosomes

• To increase genetic variation

• To halve the number of chromosomes

• To create identical cells

When does non-disjunction most often occur?

• Prophase

• Anaphase

• Telophase

• Metaphase

What is the result of non-disjunction in meiosis?

• Monosomy and Trisomy

• Tetrasomy and Pentasomy

• Haplosomy and Diplosomy

• Triplosomy and Quadrosomy

What is the term used to describe an organism with an incorrect chromosome number?

• Tetraploidy

• Aneuploidy

• Diploidy

• Triploidy

Which phase of meiosis does non-disjunction occur in?

• Telophase

• Anaphase

• Prophase

• Metaphase

What syndrome is caused by an extra chromosome 21?

• Edwards syndrome

• Down syndrome

• Klinefelter syndrome

• Turner syndrome

What is the term for having an extra chromosome?

• Tetrasomy

• Pentasomy

• Trisomy

• Monosomy

What is the main cause of Down syndrome?

• Deletion of chromosomes

• Duplication of chromosomes

• Crossing over in mitosis

• Non-disjunction in meiosis

What is the correct chromosome number in a healthy human karyotype?

• 45

• 47

• 44

• 46

What is the term for a chromosomal mutation with too few chromosomes?

• Pentasomy

• Tetrasomy

• Trisomy

• Monosomy