Understanding Chromosome and Gene Disorders

The video introduces the concept of diseases, explaining that they occur when the body does not function normally. Diseases can be caused by external factors like bacteria, viruses, and fungi, or by genetic issues such as gene and chromosome disorders. Gene disorders involve errors in DNA instructions, leading to conditions like albinism. Chromosome disorders involve abnormalities in chromosome numbers, exemplified by Down syndrome. The video also covers karyotypes, which are used to analyze chromosomes for disorders and determine sex.

What is a disease in terms of body function?

• A disruption of normal body functions

• A condition where the body functions normally

• A state of complete physical, mental, and social well-being

• A temporary state of discomfort

Which of the following is NOT a cause of diseases?

• Fungus

• Bacteria

• Normal DNA

• Viruses

What is a gene disorder?

• A disorder caused by an entire chromosome being missing

• A disorder caused by a lack of nutrients

• A disorder caused by a section of DNA with incorrect instructions

• A disorder caused by a virus

In the context of gene disorders, what does albinism affect?

• The digestive system

• The immune system

• The respiratory system

• The coloration of skin and hair

What is a chromosome disorder?

• A disorder caused by a single gene mutation

• A disorder involving extra or missing chromosomes

• A disorder caused by environmental factors

• A disorder caused by a bacterial infection

How many chromosomes does a person with Down syndrome have?

• 45

• 46

• 47

• 48

What is the primary use of a karyotype?

• To measure blood pressure

• To evaluate chromosomes for disorders

• To determine blood type

• To assess heart rate

What can a karyotype reveal about a person?

• Their blood type

• Their age

• Their height

• Their chromosome disorders and gender

Which chromosomes determine if a person is male?

• XZ

• YY

• XY

• XX

What is the significance of homologous pairs in a karyotype?

• They indicate a person's height

• They show the sequence of DNA

• They determine blood type

• They help identify chromosome pairs