Abnormal Meiosis

An image of an individual's chromosomes used to look for abnormal numbers or structures of chromosomes.

• prototyping

• imaging

• profiling

• karyotype

Occurs when a pair of homologous chromosomes fail to separate or segregate during Anaphase is called:

• replication

• translocation

• nondisjunction

• translation

• This karyotype shows Trisomy 21
• This karyotype has no abnormality
• This karyotype is missing a sex chromosome (monosomy x)
• This karyotype is from a gamete

Based on the Karyotype shown, at which chromosome pair can we identify a genetic disorder? 

• Chromosome pair 5
• sex chromosomes
• Chromosome pair 21
• There are no chromosomal disorders

Which statement is NOT true about Karyotypes

• Chromosomes (pairs 1-22) are arranged by size
• Sex chromosomes are found at the end
• A normal karyotype has 46 chromosomes or 23 pairs
• Having missing or extra chromosomes does not indicate a disorder

What is the chromosomal condition of the individual whose karyotype is seen in the image?

• Monosomy X (Turner's Syndrome)
• Trisomy 21 (Down's Syndrome)
• Trisomy 13 (Patau Syndrome)
• Trisomy 18 (Edwards's Syndrome)

Nondisjunction can result in 

• trisomy conditions
• monosomy conditions
• additional sex chromosomes
• all of these

When chromosomes fail to separate correctly during anaphase of meiosis, what can occur?

• extra chromosomes are found in the sex cell
• chromosomes of the sex cell are doubled
• chromosomes of the sex cell are halved
• meiosis never completes

Down's syndrome occurs because of a(n)

• missing sex chromosome
• extra sex chromosome
• additional 21st chromosome
• additional 18th chromosome

What would you call the failure of one or more pairs of homologous chromosomes or sister chromatids to separate normally during meiosis?

• nondisjunction

• anaphase I

• nondiploidy

• karyotype