PSYC Module 3 Notes

Question 1

Chromosomes 101

Answer 1

• Most humans have 46 chromosomes, 23 pairs

Question 2

Mitosis vs Meiosis

Answer 2

Mitosis -> Cells clone themselves
Meiosis -> Parent cells contribute hald of their information

Question 3

Inheritance patterns

Answer 3

Dominant Inheritance: 2 out of 4 get it

recessive Inheritance: 1 out of 4 get full blown

Question 4

Sex-Linked Disorders

Answer 4

Found on sex chromosomes (often carried by X chromo)
- Often females are carriers whereas males are affected
- A female would need 2 copies to be affected
- In some cases, females are affecered and males are incompatible with life

Question 5

Biopsychosocial Model

Answer 5

• Includes Heredity (genetics) and the environment
• Looks at the interconnection between biology, psychology, and socioenvironmental factos and how they play a role in topics such as psychiatry, health, and human development

Question 6

Down Syndrome

Answer 6

• Trisomy 21
• Causes developmental delays, distinctive facial features, risk of cardiac defects at birth and Alzheimer’s disease in adulthood

Question 7

Genetic counselling

Answer 7

• People with known conditions in their families can make informed decisions
• Also can be helpful if prenatal ultrasound shows baby is at risk for condition
• Planning screening based on family history/customized care

Question 8

Epigenetics

Answer 8

Environment can interact with and modify genes

e.g. exposure to teratogens during pregnancy can create genetic defects

Occurs throughout life